Update lt.po

created PKGBUILD for Arch Linux packaging

Created readme for arch build instructions

If you want to, you can add Arch support by just pushing this to the AUR

Handles on_press and on_release events to change the cursor

This reverts commit ca6a3ead.

On headerbar, editablelabel has class title
All labels on title -> bold

Title label only 1 line
Title label ellipsize

and some minor bugfixing regarding custom colors