[Bugfix] Sort network mounts alphabetically

[xavierjurado]

This is a fix for #3687, sorting network mounts alphabetically in the sidebar.

I didn't find any contributing guidelines in the repository, so please advice if something isn't quite right.

Before	After

[mtwebster]

g_autofree can only be used on one variable at a time - you need to declare name_a and name_b on separate lines, or else name_b won't get freed automatically.

g_autofree gchar *name_a = NULL;
g_autofree gchar *name_b = NULL;

though they don't necessarily need to initialize to NULL - in a simple function like this I think it's ok to combine it with the assignment below:

g_autofree gchar *name_a = g_mount_get_name (G_MOUNT(a));
g_autofree gchar *name_b = g_mount_get_name (G_MOUNT(b));

The important thing is making sure these get some sort of value before the function exits, for autofree not to crash.

Also, please keep a space between function name and opening parentheses in all changes:

// good
return g_utf8_collate (name_a, name_b);
// bad
return g_utf8_collate(name_a, name_b);

[xavierjurado]

Thanks for the review, I've just updated the PR.

[xavierjurado]

@mtwebster on a somewhat related note, is there a list of issues suitable for new contributors? Not necessarily in this repository I guess, just looking for ways to help Mint.