Visabilty issues on preferences/advanced window under GTK

[c72578]

The following screenshot shows the issues on the advanced window:

• The height of wxChoice is too low (e.g. "Unix (recommended)" is cut at the bottom)
• wxSpinCtrl is not wide enough under GTK to show the number after "Wrap at:"
• The font is very small (see: These settings affect ...)

This is an example how it looks like after applying commit
8dca5cb

Poedit: 1.8.6
OS: Fedora 21
GTK: 3.14.15
wxGTK3: 3.0.2
gnome-shell: 3.14.4

[c72578]

So far, the following has been implemented, in order to improve readability:

• Adjust wrap width wxSpinCtrl width under GTK+ 3
  vslavik@21ab527
• Use correct explanation text size even with wxGTK 3.0
  vslavik@747e3a7

Open, to be tested:

• Height of wxChoice in latest wxGTK from git

[c72578]

Here is an update, on how it looks in the meantime using wxGTK 3.0.3:

Poedit version: 2.0.2
OS: Fedora 26 x86_64
wxGTK3 version: 3.0.3-2
GTK+ version: 3.22.16-1

When Poedit 2.0.2 is built against current wxGTK 3.1 (master, commit 3105134), it looks the same: