Description of problem:
Bottles won't start after installing on a KDE system since it requires gtksourceview4, which is not a bottles package depencdency

Version-Release number of selected component (if applicable):
bottles-2022.2.28-1.fc35.src.rpm

How reproducible:
Install bottles on a fc35 installation without installing gtksourceview4

Steps to Reproduce:
1. Install a FC35 spin without Gnome
2. Install bottles
3. Run bottles

Actual results:
(19:12:00) WARNING Custom bottles path /mnt/Data/Games/Bottles does not exist, falling back to default 
Traceback (most recent call last):
  File "/usr/bin/bottles", line 56, in <module>
    from bottles import main
  File "/usr/share/bottles/bottles/main.py", line 33, in <module>
    from bottles.window import MainWindow
  File "/usr/share/bottles/bottles/window.py", line 35, in <module>
    from bottles.views.details import DetailsView
  File "/usr/share/bottles/bottles/views/details.py", line 25, in <module>
    from bottles.views.bottle_details import BottleView
  File "/usr/share/bottles/bottles/views/bottle_details.py", line 36, in <module>
    from bottles.dialogs.generic import MessageDialog
  File "/usr/share/bottles/bottles/dialogs/generic.py", line 20, in <module>
    gi.require_version('GtkSource', '4')
  File "/usr/lib64/python3.10/site-packages/gi/__init__.py", line 126, in require_version
    raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace GtkSource not available


Expected results:
The application to run

Additional info:
Installing gtksourceview4 makes bottles work perfectly well. So in my opinion it should be a direct dependency of bottles and the package should not rely on running on a GTK-based system for it's dependencies to be properly installed.