Related: #599

Fixes: #599

When not logged in, the New Issue URL only redirects to an unhelpful
login page while the Issues page allows you to search for existing
issues and still offers a "New Issue" button.

Switch to main branch to fix the build.

Related: #616

Nightly flatpak started reporting an issue with the Tracker->LocalSearch
rename:

`Error: D-Bus service file 'org.gnome.Music.Devel.LocalSearch3.service'
has wrong name`

Cleaning out the service file resolves the issue for now. This is
probably not a good long term solution.

Fixes: #616

PyGObject added an override for register_object in pygobject!219, which
mandates the use additonial arguments which were implicit before.

Add given arguments.

Fixes: #617

There is probably a smarter or more elegant way to do this, but this
works.

Fixes #553

Add error handling code for bad media art image format. Log the filename
on error.

Fixes: #605

Split out for clarity.

Declutter the main conditional

Make the key checks one big if/else statement to have a cleaner control
flow. Inline the modifiers check for this.

Music was not stopping the propagation of handled keys, as mentioned in
gnome-music#553#note_2072517.

The new control flow allows for easier controlling the
eventual propagation.

The songs view is gone, remove the corresponding shortcut.