Release 2.4.1

What's Changed

• fix digitizing polygon undo crash by @PeterPetrik in #2876
• remove deprecated QGIS API for writeAsVectorFormatV2 by @PeterPetrik in #2874
• Remove of purchasing backend & fix tests by @PeterPetrik in #2849
• HTML, Text, Spacer "other form widgets" + "show label" by @PeterPetrik in #2867
• Fix position tracking (0,0) coordinates on Android - fix locale when writing decimals by @tomasMizera in #2881
• Photo crash on project switch by @PeterPetrik in #2880
• Default/virtual fields recalculation by @PeterPetrik in #2866
• Fixed feature list - used replace function always for a string by @iiLubos in #2884

Full Changelog: 2.4.0...2.4.1