i18n: translate the whole-thread actions, shipped as English in 0.24.0

Item 108 added five whole-thread actions and their submenu last session and
never refreshed the translation, so fifteen strings had no Italian: every
entry under "Whole thread", every undo text those actions push, and their
tooltips. lrelease silently DROPS an unfinished string and ships the source
text instead, so an Italian UI showed an English submenu and English undo
entries with nothing reporting a problem.

Found by running lupdate after adding this session's own strings: it reported
19 new, of which only three were mine. The gap is the reason ctest -R
translations exists, and it did not catch this because the .ts file was never
regenerated after item 108 landed.

Also translates the Config warning about an unparseable `language` value,
which had been untranslated since the i18n audit.

lrelease now reports 373 finished, 0 unfinished. The submenu was read in a
running LANG=it_IT build and confirmed correct.

1 files changed, 74 insertions, 2 deletions

diff --git a/translations/qtmaildir_it_IT.ts b/translations/qtmaildir_it_IT.ts
index 1bf4f31..036ce4b 100644
--- a/translations/qtmaildir_it_IT.ts
+++ b/translations/qtmaildir_it_IT.ts
@@ -4,6 +4,10 @@
 <context>
     <name>Config</name>
     <message>
+        <source>Language &apos;%1&apos; is not a locale name; using the system language. Expected something like &apos;it&apos; or &apos;it_IT&apos;.</source>
+        <translation>&apos;%1&apos; non è un nome di locale; verrà usata la lingua di sistema. Atteso qualcosa come &apos;it&apos; o &apos;it_IT&apos;.</translation>
+    </message>
+    <message>
         <source>Message zoom %1 is outside %2 to %3; using the nearest allowed value.</source>
         <translation>Lo zoom del messaggio %1 non rientra tra %2 e %3; verrà usato il valore consentito più vicino.</translation>
     </message>
@@ -275,8 +279,12 @@
         <translation>&amp;Importante</translation>
     </message>
     <message>
-        <source>Mark the selected threads as important</source>
-        <translation>Segna come importanti le conversazioni selezionate</translation>
+        <source>Add or remove the important tag</source>
+        <translation>Aggiunge o rimuove l'etichetta importante</translation>
+    </message>
+    <message>
+        <source>Unmark important</source>
+        <translation>Rimuovi importante</translation>
     </message>
     <message>
         <source>Mark important</source>
@@ -315,6 +323,66 @@
         <translation>Aggiunge o rimuove qualsiasi etichetta sulle conversazioni selezionate</translation>
     </message>
     <message>
+        <source>&amp;Archive thread</source>
+        <translation>&amp;Archivia conversazione</translation>
+    </message>
+    <message>
+        <source>Remove inbox from every message of the selected threads</source>
+        <translation>Rimuove inbox da ogni messaggio delle conversazioni selezionate</translation>
+    </message>
+    <message>
+        <source>Archive thread</source>
+        <translation>Archivia conversazione</translation>
+    </message>
+    <message>
+        <source>&amp;Delete thread</source>
+        <translation>&amp;Elimina conversazione</translation>
+    </message>
+    <message>
+        <source>Add or remove the deleted tag on whole threads</source>
+        <translation>Aggiunge o rimuove l'etichetta eliminato su intere conversazioni</translation>
+    </message>
+    <message>
+        <source>Undelete thread</source>
+        <translation>Ripristina conversazione</translation>
+    </message>
+    <message>
+        <source>Delete thread</source>
+        <translation>Elimina conversazione</translation>
+    </message>
+    <message>
+        <source>Mark thread as &amp;spam</source>
+        <translation>Segna conversazione come &amp;spam</translation>
+    </message>
+    <message>
+        <source>Add spam and remove inbox on whole threads</source>
+        <translation>Aggiunge spam e rimuove inbox su intere conversazioni</translation>
+    </message>
+    <message>
+        <source>Mark thread spam</source>
+        <translation>Segna conversazione come spam</translation>
+    </message>
+    <message>
+        <source>Toggle the unread tag on whole threads</source>
+        <translation>Inverte l'etichetta non letto su intere conversazioni</translation>
+    </message>
+    <message>
+        <source>Mark thread read</source>
+        <translation>Segna conversazione come letta</translation>
+    </message>
+    <message>
+        <source>Mark thread unread</source>
+        <translation>Segna conversazione come non letta</translation>
+    </message>
+    <message>
+        <source>Mark every message of the selected threads as important</source>
+        <translation>Segna come importante ogni messaggio delle conversazioni selezionate</translation>
+    </message>
+    <message>
+        <source>Mark thread important</source>
+        <translation>Segna conversazione come importante</translation>
+    </message>
+    <message>
         <source>Tagging &amp;rules...</source>
         <translation>&amp;Regole di etichettatura...</translation>
     </message>
@@ -772,6 +840,10 @@
         <translation>Modifiche alle etichette fatte qui che nessuna sincronizzazione ha ancora trasferito all&apos;archivio di posta. Un&apos;esecuzione esterna di notmuch può azzerarle senza che questo conteggio se ne accorga.</translation>
     </message>
     <message>
+        <source>&amp;Whole thread</source>
+        <translation>&amp;Intera conversazione</translation>
+    </message>
+    <message>
         <source>Select a thread first</source>
         <translation>Seleziona prima una conversazione</translation>
     </message>