Force 1024x768 window size for automated tests

Try to keep new custom procedure inputs in view

Sloves Tab Override

First iteration of procedures modal with block workspace

Temporarily hide WeDo extension

Update music extension image

Fix toolbox xml for broadcast messages

Try using sentry to make bug finding more effective

Add number rounding in variable monitors

Fix only sprite failure

Resolve issue with improperly sized / positioned legacy backdrops

Try fixing travis permissions problem for chrome

Remove all bitmap assets from libraries

I changed the color of the bottom of the tab when selected from white
to the background color of the block chooser.
The main reason for the change was that the white bottom on the tabs
did not blend well with the boundary between gray/blue and white when
selected.  It has been changed so that there is a line that is lighter
than the regular border color which signifies that the tab is selected
and gives it separation from the white content but doesn’t separate the
content too far from the tab as a darker color would do.

Play the restored sound after undo/redo in the sound editor