Complete porting to Plasma 6

[aricaldeira]

Most of the work was done by @guss77

It also has a small new feature, a tooltip option.

Hope it helps :)

[andrevmatos]

Thank you!

[Zren]

Well crap, didn't notice my local master branch had unpushed commits... apparently I had already ported the config to QQC2 LibConfig. Oh well, I need to port it again anyways. Here's a screenshot of what it looked like (and will look like when I re-port it to LibConfig).

• https://github.com/Zren/plasma-applet-commandoutput/compare/master...libconfig

[Zren]

Hmm, one bad thing about putting them on different tabs is that the command TextFields aren't full width.

Also it seems that the format row is too wide in FormLayouts as it forces the default TwoColumn mode into a SingleColumn mode which looks weird. It looks fine if the user maximizes the window, but I shouldn't expect the user to do that every time.