This still isn't supported by the GJS backend, but it at least fixes
the error associated with GObject Introspection.

Related #1107

This also fixes GDK_KEY_Escape from the replace entry so that
too will release the search/replace context.

Fixes #1099

This looked too wrong on a number of non-Adwaita themes. As
much as I prefer the "this is an editable" styling, I'm
tired of seeing poorly implemented themes look so completely
broken.

Fixes #915

This reverts commit caff3ab8.

This reverts commit c84f54f4.

This reverts commit d9de6d3d.

This reverts commit b105b393.

This reverts commit 98af6ae6.

This reverts commit c6690069.

This reverts commit bc22f27a.

This reverts commit 323a01c0.

This reverts commit b13bc643.

This reverts commit 7ab4b574.

This reverts commit 42fb5669.

This reverts commit aae1b575.

This reverts commit a11b9a2d.

This reverts commit a62a8d0a.

This reverts commit 81305964.

This reverts commit d1b2ff70.

This reverts commit 22c740e7.

This reverts commit f396ca44.

This reverts commit 0b4e8d0b.

This reverts commit d26fd119.

Re-enable depends on #1097 and #1098