Simplify lambdas,

[Randl]

Backport

[crackedmind]

✅ Build kepka 1.0.134-uhytgggx completed (commit ab523b8325 by @Randl)

[Randl]

Possibly part of #27

[berkus]

Resolve conflicts?

[crackedmind]

✅ Build kepka 1.0.141-fwyihqvf completed (commit 6cb4980580 by @Randl)

[leha-bot]

Looks good, but please squash commits with one-line descriptions and make the commit message more descriptive for last commit ("Backport ").

fixed

[crackedmind]

✅ Build kepka 1.0.142-eiefnpmu completed (commit 9627985072 by @Randl)

[leha-bot]

FnMut is not defined in our codebase. It seems that it's defined here in upstream: https://github.com/telegramdesktop/tdesktop/blob/c7a4d67cfb63af74f6da6ca35aea9ad08cf65588/Telegram/SourceFiles/core/basic_types.h#L30

[crackedmind]

✅ Build kepka 1.0.144-uncpnqnh completed (commit 4b5f73884c by @Randl)

fixed (for real)