[db manager] use QScintilla for SQL window
[TRANSUP] nb by James

Signed-off-by: Werner Macho <werner.macho@gmail.com>
[db manager] Also removed completer.py file and its imports
Fix #6995 (db manager's SQL window freezes with long query)
IT translation update
Fix #9459 (layer fails to render when rule-based symbology make use of $atlasfeatureid)
Update contributors.json

added myself
oracle provider: improve date/time support
vector layer: fix attributeAdded signal
don't assume new attributes are added at end, because in case of joins
they are added after the provider fields and before the joined fields.

field calculator: prepare expression again after attribute was added
(fixes #9320)
osgeo4w: run filetype registration with elevated rights
[TRANSUP] pl: CptCity, Split
Merge pull request #1164 from Cracert/i18n

[TRANSUP] pl: CptCity, Split
Fix #8758 (graduated classes on expression broken)
* speed up undo of attribute added with field calculator (fixes #9509)
* also improves performance of FilterFid requests in edit mode
Minor edits to IT translation
Updating the translation to Portuguese-Brazil (pt_BR)
ogr provider: write numeric data in C locale (fixes #8332)
identify resutlts dialog: always keep minimum QgsIdentifyResultsWebView height
german translation update
styles: explictly save symbol XML in UTF-8 (fixes #9045)