Export Dialog: change default focus to file name entry
cleaning duplicate codes in customize -> weekcal -> columns width
add weekcal -> Events Count column
cleaning in weekcal (updateCols)
bug fix in weekcal (updateCols)
bug fix in weekcal columns width
WeekCal -> Events Count -> Expand option
rename ui.wcal* params for weekcal columns
bug fix: don't panic if mercurial is not installed
bug fix: don't panic on bad remoteSyncData in file