DateEdit presentation style showCurrentMonthOnly

The DateEdit widget now has a presentation style to show only the current calendar month.

DateEdit now has a presentation style named "showCurrentMonthOnly". This style configures whether the calendar shows only the current months, or displays (in light grey) days of the previous and next month. The default behavior is that the days of the previous and next month are visible.

Default style definition:
<Style name="DateEdit.onlyCurrentMonth">
  <StyleAttribute name="showCurrentMonthOnly" value="no">
</Style>
Style definition showing previous and next months (showCurrentMonthOnly="yes"):
<Style name="DateEdit.withPreviousAndNext">
  <StyleAttribute name="showCurrentMonthOnly" value="yes">
</Style>