[fs-widget] Implement an alternative config pattern

net-speed bugfix

need to divide by time

volume-widget: open mixer on middle click

Make net-speed width configurable with args

Add an alternative to change the color of the button's label

Fix email widgets being inaccessible

When fixing linter warnings in
ed2b2564


the previously global values were made local but no return statement to
export them was added.

Signed-off-by: Lucas Schwiderski <lucas@lschwiderski.de>

prevent battery widget from crashing by ignoring null capacity field of Logitech mice

Brightness: add support for left/right click

minor fixes

Some more READMEs installation instructions

toggles brightness between current level and 0

sets brightness to "base" level

not needed