Recursive G

Results 4 issues of Recursive G

According to https://www.x.org/releases/current/doc/man/man3/XFilterEvent.3.xhtml, an event should be discarded if XFilterEvent returns `True`. Fix #1794.

X11
input

Commit 0e9b139b5b72cc36584811d4a5575d1dd2fb17fa Notch's Head

bug

Current synchronous skin loading strategy causes severe game lag.

bug
enhancement