limit view position
add compress visual feedback
add externel link
fix ghost shown bug
fix no tree center bug
fix resize bug
fix compress/expand tree line bug
inverse transeparency of birdeyeview
add tree range slider
fix double compress crash
adjust file dialog layout
add histogram
add progress bar
add lazy tree selection
fix cells structure
modify compressed tree representation
fix double compress bug
fix some bugs
remove popup due to performance issue
add cell color
boost tooltip interactivity