fix dialog btn remove widget bug
fix some bugs
build question and items relationships
add actionlist for every widget
differenicate widget and item actions in the dialog
optimize the button position
make the buton font bigger
add sequence number for the last questions in the demo page
fix button bug
add tip for widget action
ajust item creattion logic for mutex of matrix actions
finish optionPanel
add ajax supoort
Merge branch 'feature/optionPanel' into develop