This reverts commit 2ce46965.

This reverts commit fba2ff8b.

When a user adds an item (either by adding or copying an item), select
it.  Fixes a bug with copying and pasting sources where the pasted
source will not have the copied transform applied to it.

In main menu, File > Show Recordings does not show the path for ffmpeg
custom output when it is selected in Settings.
This fixes the issue.

This is a weird one. On KDE just clicking in the options or right
clicking the empty space areas of the mixer dock would trigger a layout
change.

This fixes mantis #1256

This hides the dock icon when minimizing OBS to the tray on OSX. This
also fixes the bugs with minimizing on startup (and hides the dock icon
correctly in that case as well).

Closes obsproject/obs-studio#1430

Fixes an issue where the user could not perform a horizontal/vertical
flip, or rotate group sub-items via the transform context menu.

Fixes an issue where the web page could have both horizontal and
vertical scrollbars, making the information dialog page look a bit
unsightly.

Allows the ability to specify release candidate versions in the
whatsnew.json in order to allow startup information dialogs to be
displayed to the user which are specific to release candidates.

This commit adds the ability to select a background color for a
scene-item, whether it's a custom color or one of eight presets.

As this is an initial implementation, it lacks theme customizability,
and it also lacks the ability for the user to set their own preset
colors, so only the hard-coded 8 are available.

Closes obsproject/obs-studio#1375

Contrary to what the name would have you believe, QPointer<> is not used
to delete a pointer when it leaves its specific scope.  Instead, it's
used to check to see if the pointer is still valid.  For most
QWidget-based objects, this is actually fine because QWidgets that are
assigned to layouts or other widgets will automatically be destroyed --
however, for non-widget objects, this can cause a memory leak.

This patch replaces QPointer with QScopedPointer where applicable to
prevent memory leaks.

Closes obsproject/obs-studio#1367

This adds a confirmation dialog for streaming or recording if
there are no sources.

Closes obsproject/obs-studio#1344

Allows the ability to show a web page via CEF to the users on startup to
present and announce new features.

Currently the only thing preventing a user from trying to start multiple
streams or recordings is the UI buttons being disabled. The hotkey code
allowed the user to bypass that, which for streaming resulted in lots of
rtmp output connect threads spawning, which stomped all over each
other's data structures and resulted in crashes.

This fixes a crash in case the user selected the option to save
projectors on exit and had multiple monitors at that time. Later on,
when obs is started again if the monitor list is lower now the open
projector code will return null when trying to create the saved
projector.

Just check if the returned projector pointer is valid before trying
to restore the saved geometry.

On initial creation of an empty group, do not open a properties dialog
for groups.

Because sub-items of groups can no longer reroute their signals to the
parent scenes of groups, delegates removal handling to SourceTreeItem
instead of OBSBasic.

Allows copying and pasting of groups.  The user can fully duplicate the
group, or create a reference of the group.  The user cannot paste a
reference of the group if it already exists within the same scene
however.

(This commit also modifies UI)

Changes groups to their own independent type, "group".  This allows them
to be used like other regular types, and allows the ability to reference
groups in multiple scenes.  Before, a group would always be linked to
the scene it was in.  This made it cumbersome for users to modify groups
if they had a similar group in multiple scenes (they would have to
modify each group in each scene).  Making groups like other source types
makes more sense to solve this issue so they can be referenced in
multiple scenes at once.  This also removes a significant amount of
group-specific handling code required for implementing groups in the
front-end.

One limitation however: due to the way sub-items of groups are
seamlessly modifiable and sortable as part of the whole scene, the user
cannot have multiple references to the same group within one scene.

(This commit also modifies UI)

Removes obs_scene::group_sceneitem and replaces it with
obs_scene::is_group.  Changes a number of other functions related to
groups so that a group is not inherently tied to a specific scene, and
helps allow a single group to be referenced in multiple scenes if
desired.

This fixes an issue where the stream button would still be
checked when clicking no on the stream confirmation dialog.

When the vertical volume meter was introduced it set in the OBSBasic.ui
mixer dock definition a min width/height that was valid for both
widgets. QStackedWidget hints the minimum size as the higher w/h
of its children so this workaround is necessary.

Closes obsproject/obs-studio#1296