Some basicaly styling tweaks

[jabiertxof]

Basicaly do styling fixes. Also open inkscape and allow set again new inkscape

[imvenx]

My first PR, nice!

A few things that I have noticed:

• The animations don't work for me, not sure why
• There is some repeated functionality that I already did on dev branch, but haven't integrated in master, like change inkscape path
• I have modified probably all 17 files in my dev, so is going to mean merge conflicts evereywhere

My bad for not merging master with dev before, but we could communicate better next time so we coordinate efforts better.

I don't think it is going to be possible to merge this PR, but I like many of the style tweaks, and I'm going to try to pick them and integrate them. Thanks!