+ Use `pulsemixer` for audion volume control
+ Update polybar configs to not use sudo when running commands
+ Add Logout to polybar menu foor logging out of system user
+ Add brightness module to polybar to show backlight percentage 0-100
+ Migrate yakuake configs to a branch with a full DE
+ Update `.bash_aliases` to include `kapp-update` and `kapp-git`
+ Add conditional sourcing of untracked `.bash_secrets` file, if it exists