cleaning and tips
change TimeLineTree.search to return generator
a little cleaning in event_search_tree
fix bug (import translator) in timeline
copy date by middle clicking on tray icon
rename cal_modules to cal_types
timeline: add boxSortByWidth option
a few fixes and improvments in MultiSpinButton
move some duplicate codes between MonthCal and WeekCal in buttonPress to CalBase
move myKeys from instance to class, add _i_ key to show Day Info dialog
fix design problem about key-press-event
cleaning MainWinVbox.keyPress
cleaning MainWinVbox (confStr -> params)
comment in ui.py
fix ui.prefPagesOrder
cleaning. renaming and code movings in cal_types
cleaning (core.calTypes -> calTypes)
handle file-activated signal in ExportToIcsDialog (but it's not working)
cleanings
fix IndentationError