Merge branch 'hotfix/fix_image_path' into develop
improve readme
support command contribution by other plugin
set modal flag to window
close window by clicking main frame
return all models when empty search key
return all stereotypes when search key is null or empty
use only panel instead of window
remove candidate list window
rename CandidatesWindowPanel -> CandidatesListPanel
remove close button
for showing panel
enable to drag for moving
move CandidatesListPanel to QuickPanel's internal
enable to click quick window
add mouse selection
extract listner class
candidate list is always shown on window
use JTextField#setAction instead of input map
commit command or candidate by double clicking at candidate list