Do not backport string changes since we are after string freeze phase
- Don't stop when the plugin directory is empty
- Fix missing margins on Troubleshoot window
- Resize all solutions panels horizontally
- Fix missing priority color for proposed solutions
- Set translation domain for Gtk.Builder() object to have strings
correctly translated
- Make labels on GtkButtons translatable
- Handla all exceptions from do_analyze_logfile()
- Fix semi-translated messages
- Do not catch POSIX signals (rhbz#1366004, rhbz#1419245)
