Improve sound editor performance with longer sounds

chore(package): update scratch-vm to version 0.2.0-prerelease.2019011…

Remove transition on sprite tiles to make placeholder not flash black.

Remove scale transition from green flag, stop and sound editor buttons

chore(package): update scratch-render to version 0.1.0-prerelease.201…

Update WeDo 2.0 extension name

Closes #4378

Forcing the playhead onto its own painting layer removes an expensive composite with the waveform. Animate using transforms instead of left prevents layouts of the rest of the page while playing a sound.

The waveform component was being re-rendered while the playhead changed, which is a costly operation because it has to calculate the full svg path data string.

Also use white as the background since it gives the same impact and will not look bad if the filter isn't applied or takes a while to be applied

Closes #4390

Peripheral disconnect status using new runtime/vm event

Add BorderedMenuItem and use it for delete menu, with updated style

Fix sound reorder crash

We were emitting drops when getMouseOverIndex was null, which could happen either when the drop is outside the container, or there were zero boxes to check for ordering. Treat these two cases separately, and continue to not emit drops when outside the container.

This reverts commit 97f8eb63, reversing
changes made to 2e017f06.

See #4382 for more info about why, and what we need to follow up on it

Fix backpack squishing

Update scratch-l10n to the latest version 

update scratch-blocks for languages.

Fix delete button on sprite tiles

The previous change that made the images laid out using absolute meant that the close button was layered below the sprite image, making it now clickable

Revert "Adds BorderedMenuItem and use it for delete menu"

Update scratch-blocks

Update scratch-l10n to the latest version 

Update scratch-render to the latest version