application does not get focus

[Antoine Martin]

Seen with d-feet, the whole window is slightly greyed out as if we had not given it focus.

Affects 2.3 to 2.5, 1.0 is not affected.

[Antoine Martin]

Bisecting:

• 2.0 latest: OK, required r21954 build fix for Fedora 29, built with --without-nvenc7 --without-dec_avcodec2 --without-enc_ffmpeg to avoid codec errors:
• 2.1 latest: BAD, built with --without-nvenc --without-dec_avcodec2 --without-enc_ffmpeg

The bug seems to be client-side.

Bisecting 2.0 to 2.1:

• r16000: OK, required minor build fix to keyboard_bindings.pyx
• r16400: BAD
• r16200: OK
• r16300: OK
• r16350: build error..
• r16335: OK
• r16370: BAD
• r16355: runtime error
• r16345: BAD
• r16340: OK
• r16342: BAD
• r16341: OK
• r16342: BAD

Fixed in r21955.