randomize sprite positions when added from image file or from library (through 'choose from library' and 'surprise')

Co-Authored-By: towerofnix <9948030+towerofnix@users.noreply.github.com>

That is, as the default value for the input, not the placeholder.

Liked @paulkaplan’s suggestion that the property get renamed `showBranding` as we use ‘embedded’ in multiple ways that would get confusing.

The embedded project view is ‘playerOnly’, ‘fullscreen’ and ‘showBranding’.

It was causing a bug where switching tabs and adding a sprite would make the workspace blocks not work. Needs investigation.

I do not like how the alert component is hyper specialized for two distinct use cases. It would be much better to refactor the alerts so that the alerter can just fill the alert with whatever they want. But I do not feel comfortable making that refactor because I know ben and evelyn have gone back and forth about these alerts.

Listen to the new project changed event from the VM and keep track of the state in Redux.  Update it as appropriate.

Known issue is that the project is marked as "changed" immediately after it's loaded. This is due to asynchronous event emitting while the project data is loaded, and needs an update to the VM to fix.

The functionality was all moved to the Controls container, these containers are no longer used

Expand on the backdrop integration test to make sure this is documented/tested behavior

This will work better if there are other query string options that need to be handled later. It also handles the distinction between ‘all’ and the other tutorials better.

The use of an "override" prop that allowed the preview modal to be hidden without actually changing the redux state was causing a problem where the block editors where not closing when modals were opening. That is because it relied on the modal reducer being accurate.

I defaulted the preview state to false to make it simpler to consume the GUI, as www will not want the preview info to be true. I made it true in the playground instead.

This fixes https://github.com/LLK/scratch-gui/issues/3710

Remove explicit mention of canUseCloud prop. It will get automatically passed down to the child components.

Also pull out `onUpdateReduxDeck` prop out to avoid warning when it’s passed to nested components.

Moved the tutorial id handling into gui so it works when gui is embedded in www as well as standalone.

This seemed better than adding the same query handling to www, in order to pass an id to gui.

Note, the `?tutorial=all` handling remains in app-state-hoc. Currently it’s only needed in standalone mode for Hour of Code. It’s easy to move into the gui container if we do want it in gui by default.

Save and load monitor position information. When the monitor is auto-positioned or dragged, a new location should be recorded in the monitor data.