ui: Untabify all files

We want spaces there. The top-panel was the first offender
but let's get the others correct too.

Signed-off-by: Guido Günther <guido.gunther@puri.sm>
16 jobs for simplify-ensure-type
in 52 minutes and 49 seconds, using 0.0 compute credits, and was queued for 3 seconds