fix: prevent exception when updating a bottle's dependecy list view

[ju1ius]

Description

When calling DetailsDependenciesView.update(), additions of new DependencyEntryRow instances were scheduled by calling GLib.idle_add(new_dependency, dep, plain=True).

However, GLib.idle_add doesn't support keyword arguments other than "priority" (which is an alias for GLib.idle_add(priority, func, *args)). This ended up raising the following exception:

Error while running async job: <function DependenciesView.update.<locals>.process_dependencies at 0x734818d37880>
 Exception: idle_add() got an unexpected keyword argument 'plain'

File "/app/share/bottles/bottles/backend/utils/threading.py", line 62, in __target
 result = self.task_func(*args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/share/bottles/bottles/frontend/views/details_dependencies_view.py", line 140, in process_dependencies
 GLib.idle_add(new_dependency, dep, plain=True)

Moreover, when a DependencyEntryRow, is created with plain=True then the dependency argument must be a str, not a tuple, which was not the case here.

Fixes #3983, #3992, #3997, #4006, #4018, #4019, #4037, #4041, #4044.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

By building an runnig the flatpak locally, creating a new bottle, adding and removing some dependencies, while verifying that no relevant exceptions were logged on stdout/err.

[mirkobrombin]

Hi, can u re-make this PR on top of main, please? Sorry for the trouble.

[reiyua]

Cheers @ju1ius for providing the fix to my issue!