Bug 258930 – [GTK] Automatically save and restore the layout mode and dimensions of the web inspector

• Status: NEW
• Component: WebKitGTK

[Jeff Fortin]

Originally filed at https://gitlab.gnome.org/GNOME/epiphany/-/issues/2120

When calling the web inspector (whether through the menus or by pressing `F12`), it always shows up as a split pane at the bottom of the current window, with its own arbitrary sizing/positioning, which is never what I want, and it is tedious to re-place it every time.

Like other browsers, Epiphany should automatically remember and restore:

* The type (vertical vs horizontal split, vs floating window)
* The pane's position (in the case of horizontal or vertical split)
* The floating window's sizing (width and height).
* I reckon the window position can't really be remembered because that's not supported on Wayland, so I could live with that part not being remembered, but if it can be done at least for Xorg users that's a nice touch (as long as it does not end off off-screen in the case of multi-monitors vs laptop scenarios...)

I don't think I'd need per-webapp settings, probably application-wide would be OK/expected?

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Tested on Epiphany 44.3, WebKitGTK 2.40.3, Fedora 38 with Wayland GNOME session