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
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)
dxf export: add extension (fixes #9544)
Fixed GML parsing of GetFeatureInfo from GeoServer, fixes part of #9377
dbmanager: fix 'load as new layer' (fixes #9548)
[TRANSUP] pl: Oracle, Sponsors