A bunch of XFCE plugins



See merge request !82

user/kalgebra: +depends=qt5-qtquickcontrols kirigami2

Fixes #59

See merge request !95

Bump alsa-plugins and alsa-utils to 1.1.7



See merge request !91

user/i3lock: take, bump to 2.11



See merge request !94

user/cups-filters: bump to 1.21.3

NB: needs relbump after poppler gets bumped to 0.69:
https://github.com/OpenPrinting/cups-filters/pull/66

See merge request !93

user/feh: bump to 2.28



See merge request !92

Using #!python3 breaks Bash in /bin/sh mode (bad interpreter:
No such file or directory).  This fixes that error, so that udisks2
builds properly.