Xournalpp: preferences dialog is too wide for my screen

[cbm755]

Affects versions :

• OS: Windows, Fedora GNU/Linux]
• Version of Xournal++ branch LittleHuba:fix_device_listing_new, master a37524e2626e269e1c1defbdf5abe3305d29e863

Describe the bug
On Windows 10, I have a portrait screen that is 1200 pixels wide. But I have some big fonts and/or other scaling selected (could check details if needed). With this setup, the preferences dialog doesn't fit horizontally on the screen (screenshot below).

On my Fedora laptop, I checked the master branch and the minimum size of the preferences dialog is 968 pixels. But I suspect this depends on OS fontsize preferences etc.

To Reproduce

1. select a low res screen (I guess something like 800 pixels wide)
2. open preferences

Expected behavior
If the preferences dialog were a bit more compact or was able to shrink a little more then it would fit. Or the panes would scroll horizontally as they already do vertically.

Screenshots of Problem

[sanette]

I see two potential solutions

1. slightly reorganize the grid of the "Action on Tool Tap" setting, which is the largest element in the Settings.
2. allow horizontal scrolling

I think we can do both, what do you think?

[sanette]

by the way, there is a missing GtkScrolledWindow in inputTabBox, I can add it too

[rolandlo]

This was fixed in PR #2592