Makes it a bit more clear that this always minimizes to system tray.

Closes jp9000/obs-studio#748

This adds an option to the general settings to save the opened
projectors on exit.

(Note: Fixed conflicts -Jim)

Closes jp9000/obs-studio#743

Closes jp9000/obs-studio#737

Closes jp9000/obs-studio#721

This commit adds the ability to copy a scene item's transform and crop
settings and paste those settings onto another scene item in any scene
or scene collection. It also changes the menu shortcut key for the
Transform action "Center to screen" from "C" to "n" because "C" is the
standard shortcut key for "Copy" in most other applications.

Closes jp9000/obs-studio#719

Replay buffer and recording should be separate in case the user wants to
start recording from a specific point rather being forced to reconfigure
for regular recording.

Creates a new button on the main window below the recording button for
turning on/off the replay buffer.

It should specify that the user specifically needs to set the "save"
hotkey, not just "the replay buffer hotkey".

Adds preview scaling to the right-click context menu for the preview
pane.  This allows the ability to, for example, zoom the preview and
edit the preview 1:1 (canvas/base resolution).  This was a missing
parity feature.  Additionally, also allows scaling to the
"output/scaled" resolution the program is set to.

When the preview is in scale mode and is the focused widget, you can
hold space and drag with left click to change the zoomed position.

(Notes added by Jim)

Closes jp9000/obs-studio#687

This adds streaming and recording timers to the frontend tools.

Closes jp9000/obs-studio#625

Closes jp9000/obs-studio#630

Adds a reset and close button to the transform dialog.

Closes jp9000/obs-studio#612

Allows manipulating and modifying the front-end via plugins.

This is to prevent confusion both when prefixing commits and when
reading the directory structure for the first time.

Closes jp9000/obs-studio#563

This adds a system tray when enabled. There is also a option to minimize
to the system tray when the app is started.

Closes jp9000/obs-studio#595

Adds the ability to lock the preview so sources can't be edited.  This
feature is typically used in the case where the user wants to prevent
accidentally clicking and dragging on sources.

Adds a little improvement to quality-of-life, a typical "View" menu with
the ability to show/hide the following (for now):

- Listbox toolbars
- Status bar
- Transitions pane (some people don't really need/use/care about it)

Adds scale filtering options to the scene item right-click context menu.

Allows the ability for users to make it so recording automatically
starts when they start streaming.  Also adds the option to allow the
recording to continue when stream is stopped.

Closes jp9000/obs-studio#554

The new cutoff timing fix means that streaming/recording has to remain
active for bit until the stream/recording has reached the expecting stop
timestamp.  This means that the buttons would continue to say "Stop
streaming/recording" while waiting for the output to stop itself at the
appropriate timing.

So instead of letting it do that and confusing the user, the buttons
will now say "stopping" when the button is pressed to indicate to the
user that the stream/recording is in the process of stopping.

Instead of just remuxing from FLV to MP4, allow remuxing to/from the
various container formats that are available.

Warns users that two separate QSV encoders can't be active at the same
time.

This should be considered a temporary solution to two issues:
1.) Encoders need to be able to report these errors themselves
2.) If the QSV encoder is ever changed to allow more than one encoder at
    the same time this should be removed

Specify that it's the streaming bitrate and not just "bitrate" so users
hopefully realize that it's not referring to the recording settings.

Allows the user to know that the maximum bitrate limit for a streaming
service is being enforced.

Allows the user to disable streaming bitrate limits in simple output
mode if they so choose.  This option is enabled by default.

Allows the user to snap sources to the edges of other sources, on by
default.

Closes jp9000/obs-studio#530

Allows users to snap sources to the horizontal or vertical centers of
the screen.  Off by default.

Closes jp9000/obs-studio#528