Before this commit, get_binding() exited on the first match without
marking the rest --release bindings with B_UPON_KEYRELEASE_IGNORE_MODS.
Similarly, once it found a --release binding during a KeyPress event it
would stop searching for a matching key press binding.
Example config, placing the --release line first will trigger the second
problem:
# i3 config file (v4)
bindsym Super_L exec notify-send "press"
# or
# bindcode 133 exec notify-send "press"
bindsym --release Super_L exec notify-send "release"
# or
# bindcode --release 133 exec notify-send "release"
Fixes#2733
From 548d74015c:
> 1. press $mod, press x, release x, release $mod
> 2. press $mod, press x, release $mod, release x
case (2.) didn't work, now it should be fixed.
