Fixed renaming sprite breaking script references to that sprite
Fixed scripts running after they were deleted and added delete item to procedure hat context menu
Added a semicolon
Removed a trace() statement
Prevented duplicate sprite names
Removed a trace() statement
Fixed renaming sound breaking references to that sound.
Removed unused reference to app
Merge branch 'stop-deleted-scripts'

Conflicts:
	src/ui/BlockPalette.as
Made empty sprite name turn into Sprite<n> instead of <n>
Fixed updating references
Merge branch 'rename-sprite-update-refs'

Conflicts:
	src/scratch/ScratchRuntime.as
Made renameSprite/renameCostume DRYer
Implemented isSoundNameUsed and fixed a copy-paste error
Merge branch 'rename-sound-update-refs'

Conflicts:
	src/scratch/ScratchRuntime.as
Switched to using unused names when renaming costumes and sprites
Switched to translated defaults when renaming costumes and sounds