updated callback attachment functions and variables
added update_color edition function
moved scene edition function
increased data input size to 4096 bytes
removed commented out try statement
stop render now checks for existing render
added toggle window on top button
stop render before opening new project
reformatted file open dialogue to avoid bug where file picker doesn't work correctly when window_on_top is set
console out no longer wraps output
code cleanups
output starting render info message
added shortcuts
added toggle console toolbar item and shortcut
fill implementation of  toggle_keep_window_on_top()