Removed all translations of key shortcuts.

- Removed translation of Function keys for all languages
- Removed also remapped shortcuts for Italian

See issue #2178 and discussion in PR #2235.

# Conflicts:
#	src/translations/sqlb_cs.ts
#	src/translations/sqlb_de.ts
#	src/translations/sqlb_es_ES.ts
#	src/translations/sqlb_fr.ts
#	src/translations/sqlb_ja.ts
#	src/translations/sqlb_ko_KR.ts
#	src/translations/sqlb_pl.ts
#	src/translations/sqlb_pt_BR.ts
#	src/translations/sqlb_ru.ts
#	src/translations/sqlb_tr.ts
#	src/translations/sqlb_uk_UA.ts
#	src/translations/sqlb_zh.ts
#	src/translations/sqlb_zh_TW.ts

src/translations/sqlb_fr.ts

@@ -7176,7 +7176,7 @@ p, li { white-space: pre-wrap; }
     <message>
         <location filename="../SqlExecutionArea.ui" line="151"/>
         <source>F3</source>
-        <translation>F3</translation>
+        <translation></translation>
     </message>
     <message>
         <location filename="../SqlExecutionArea.ui" line="158"/>