We were not using this api at all, so lets drop it.

inspector: Fix the "Software GL" switch

See merge request !1491

This was crashing.

Matthiasc/for master

See merge request !1488

Events are no longer objects, so this does not do
any good. Use gdk_event_unref instead.

Fix a typo in gtkplacessidebar.c

See merge request !1486

Some mistyped vim command got into the code in commit 60d28132.

Fix a leftover occurrence of ::expand

See merge request !1485

gesture: Actually track targets

See merge request !1484

Due to a mismerge, this wasn't actually working,
and was causing criticals from gtk_widget_has_grab
when dragging windows.

We can't rely on the pspec for a removed property.
This code worked until I actually removed the properties.

Update the tests to reflect this.

expand and margin cleanup

See merge request !1479

Trying to get the ci style test to pass.

Various documentation fixes

See merge request !1481

Remove last instances of GtkFileChooser:show-hidden

See merge request !1480

The file chooser widget is still setting the show-hidden property, even
though it was removed.

Replace it with margin-start, -end, -top, -bottom throughout.

The hexpand and vexpand properties are sufficient.

Update the expected results of the tools tests that are
affected by the new property handling for expand and margin.

Replace expand by hexpand and vexpand and
margin by margin-left, -right, -top, -bottom.

Restructure CI jobs

See merge request !1476

Use the Clang static analysis tool.

For the time being, we're going to allow it to fail, but the plan is to
fix every issue it raises.

Do a better job at detecting whether we have Docker installed.

We want the style checks running at the start of the CI pipeline, no
need to have a specific phase for it.

We want to re-use it for other jobs.

Propagate the exit status from clang-format-diff.py to avoid it being
overwritten by the `echo` at the end of the script.

Don't build the API reference on deploy; build it in a separate job,
instead, so we can run it on all pipelines, and deploy it only for
master.

wip/baedert/for-master

See merge request !1466