Simpler path bar

[tintou]

Problem

The current code for the path bar is really non-obvious and will be difficult to move to GTK4

Proposal

Have a less complicated path bar.
In macOS the path bar is even hidden by default, while I don't think that it is what we want here, having it styled with simple arrows would make it simpler and easier to maintain.

Prior Art (Optional)

Finder:

[danirabbit]

Yeah I think the slash style like in GNOME Files Gtk4 port looks nice too

[jeremypw]

Also need to decide how to incorporate the Searchbar.

[hanaral]

@jeremypw Would it be too wrong to have a search bar like appcenter or music? If there isn't going to be a text based pathbar then the next most obvious thing is a permanent one.

[jeremypw]

It would certainly improve discoverability to have it permanently visible although it may increase the minimum width. I guess it need not be too large as search terms are generally short. Other possibilities would be a Code-like search bar in a revealer, or having it in a Stack with the path bar. Anyway it would be a separate widget.

[PlatonB]

Yeah I think the slash style like in GNOME Files Gtk4 port looks nice too

Pathbar in Gnome seems bad to me because there is no way to copy the current directory path.