+ (#121) add shortcut for moving a row
+ (#125) cancel search by making find handler as thread

.changes
create thread and allocate find handler to thread
+ (#120, #125) search progress in a view_flow, break/cancel searching
+ (#123, #126) move to point when Ctrl is pressed. prepare for move point to point with key stroke
+ in plot window, zoom and fit to tick point of chosen log index
! highlight mis-ranged, shortcut for view window
!remove menu shortcuts, debug responsless file drop event