switch DB Manager's SQL editor to QgsCodeEditorSQL
case insensitive autocompletion
[TRANSUP] some fixes and improvements for transifex including renamed and deleted ts files

Signed-off-by: Werner Macho <werner.macho@gmail.com>
add missing ts files (fixes #11662)
Merge pull request #1686 from alexbruy/dbmanager-sqleditor

switch DB Manager's SQL editor to QgsCodeEditorSQL