[scribus] Enable touchscreen and tablet support

[ale rimoldi]

hi luya

> It is basically a hit and miss when using Scribus on a convertible 
> touchscreen laptop like HP Envy x360 convertible Ryzen 2500u.
> 
> The touchscreen part seems working but the non-wacom stylus similar
> to those found Microsoft Surface Pro series failed.
> 
> Test done on latest snapshot.

did it work better in the past?
does it work well with other (free / qt based) programs in the same
environment?

for what kind of actions do you have issues?

ciao
a.l.e