2 requests for: GUI & symbols

[hawk 33]

Firstly:

• A lot of drop-downs/popover GUIs sound an alert and flash the screen (as per the OS X accessibility option) when I press ESC. Examples: font size dropdown, text justification dropdown, . This is not the correct behavior, as this error normally means "invalid input". In this case I'm pressing the escape key to cancel and close the GUI element.
• Some GUIs don't do this, but instead cause my object selection to be cleared. Examples: stroke settings popover.
• Some GUIs correctly respond by closing without an error and without clearing my selection. Examples: font family & font face dropdowns, color selection popovers.
• The gradient settings panel specifically ignores ESC altogether.

Please make the GUIs respond to keyboard input consistently!

My second request is simple: the symbols sync on/off button is a global toggle. Please add it to the menus (under Edit) so I can bind a shortcut to it!

Thanks!