Update #98

• format_number() now supports an optional leading +
• Made 640×360 games fill the IDE emulator view when in large mode (small mode still uses 2:1 scaling)
• Distribution constants now display the numerical probability of each even
• Added capitalized()
• Test UI layout now shows the constants editor when the browser window is wide enough to fit it beside the debugger
• Debug override layer for array and object IDE constant properties
• Fixed new constant array element creation dialog “create” button disabled
• find() now supports an optional start key for objects
• export script now supports "data" assets and constants
• array constants in the game.json can now be created from a CSV file
• Added --nosleep argument for quadplay-server and quadplay.html