improve text entry boxes/fields refocus = update mechanism

[nutela]

# how to reproduce Start Playground, change colour of object by entering a new value in Red, Green or Blue, click and drag onto the drawing field to make a new object # experienced behavior Colour is not changed unless we refocus on something else. No new object can be made because input text field blocks refocussing but this might be due to Playground itself # expected behavior When changing values in text entry boxes, they should take the values and update in a short time out when there is no keyboard input in a short period of time or any other more 'elegant' sollution.