Disabled DX12

Orphaned code

Merge branch 'develop' of https://github.com/UnigramDev/Unigram into …

…develop

Smaller switch theme button

Consider text margin while measuring it

Merge pull request UnigramDev#1997 from UnigramDev/MarcAnt01-patch-3

Adjust margin in voip settings

Merge pull request UnigramDev#1857 from UnigramDev/develop

v4.2