main/postmarketos-ui-xfce4: Add further improvements

Improvements from xfce4-phone source:

  • Add screenshot to
  • Enable screen locking
  • Disable Desktop icons "Home", "File System", "Trash"
  • Enable single-click on Desktop
  • Enable single-click in Thunar
  • Change clock format
  • Set postmarketos wallpaper

Additional changes in postmarketos-ui-xfce4:

  • Installing greybird-themes (which is already set as default theme in /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xsettings.xml).
  • Changing /etc/skel/.config/autostart/onboard-autostart.desktop to slightly speed up keysboard startup (overriding startup-delay of /etc/xdg/autostart/onboard-autostart.desktop).
  • Enabling scrollbars by /etc/profile.d/, this is helpful where touch-scrolling doesn't work like e.g. in whiskermenu.

(And re-ordered network-manager-applet in APKBUILD _pmb_recommends section.)

Currently marked as draft because: MR xfce4-phone!7 (merged) needs to get merged and and release 0.4 to be set up. Thereafter I'll change the source in APKBUILD back to $pkgver.

Edited by Jakko

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