The panel corners try to match their style to the buttons closest
to them. In order to make sure the corner styles stay in sync with
their neighboring buttons, they connect to the style-changed signals
of the buttons.

In order to make sure the style-changed signal handler isn't leaked,
it gets disconnected when the button is destroyed.

Unfortunately, the destroy signal handler connection itself gets leaked!

This commit ensures the destroy signal handler gets disconnected any
time the neighboring button is re-determined.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1460


(cherry picked from commit b41ef2f6)

Florian Müllner authored Oct 18, 2020 and Robert Mader committed Oct 19, 2020

meta_window_actor_get_image() may return NULL. Instead of crashing,
catch that case and return a proper error.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3258

(cherry picked from commit d72da7d2)

We currently format the temperature with a precision of 0, that is
with no digits after the decimal-point. As a result, a temperature
like -0.2 shows up as -0.

Math.trunc() has the same effect as `%.0f` and handles that edge
case correctly, but while at it, we can just as well round the
value properly.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3441

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1548>


(cherry picked from commit e85d127a)

Calling both window-drag handlers on drag begin messes up our tracking,
and prevents the swipe tracker from being disabled during drag operations.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1551>
(cherry picked from commit c401759c)

Without this a screen reader just calls the notListedButton a
"push button" instead of also including the "Not listed?" text.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1567>
(cherry picked from commit 7222bffd)

Update NEWS.

This reverts commit 3ae4a28d

Not checking for this would result in `clutter_actor_add_child`
failing, but StBin keeping a copy in `priv->child`. So later on,
`st_bin_remove` would never be called on it and this assertion
would fail and crash the whole shell:

```
static void
st_bin_destroy (ClutterActor *actor)
{
  StBinPrivate *priv = st_bin_get_instance_private (ST_BIN (actor));

  if (priv->child)
    clutter_actor_destroy (priv->child);
  g_assert (priv->child == NULL);

```

By disallowing spurious `st_bin_set_child` calls we now prevent StBin
from entering such a corrupt state and the above assertion won't fail
anymore.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1507>
(cherry picked from commit 244c266c)

Launching the app is implemented by the source's open() method, but
only external notifications are hooked up to call into the source
when no default action was provided.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1595>
(cherry picked from commit ddc2e0f4)

'image-data' (or 'image-path') should take precedence over 'app-icon',
even when both are sent by the application (e.g. Google Chrome).

Fixes #3616.


(cherry picked from commit 779e66ae)

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1621>

Jonas Dreßler authored Feb 13, 2021 and Robert Mader committed Feb 15, 2021

When we're painting off-stage, for example because we're screencasting
or taking a screenshot, there won't be a stage-view associated with the
paint context. The BlurEffect previously didn't handle that case and
would crash.

Fix that and handle that case by assuming the scale is 1 and not
offsetting the rectangle we blit from the draw framebuffer.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1673>

(cherry picked from commit 09602ae2)

Update NEWS.