Fixed re-rendering issue in Calendar component (#300)

* Fixed re-rendering issue in <Calendar/> component

The `onMouseLeave` prop of `<MonthView/>` should be `null` when `selectRange` is not set. It is causing unnecessary re-rendering of the whole `<Calendar/>` component on the hover of `<Weekdays/>` component (child of `<MonthView/>` ) due to fire of the `onMouseOver` event passed in its child `<Flex/>` .

* Remove unnecessary prop

Co-authored-by: Wojciech Maj <[email protected]>

Author: UtkarshPramodGupta

src/Calendar.jsx

@@ -523,7 +523,7 @@ export default class Calendar extends Component {
             formatLongDate={formatLongDate}
             formatShortWeekday={formatShortWeekday}
             onClickWeekNumber={onClickWeekNumber}
-            onMouseLeave={onMouseLeave}
+            onMouseLeave={selectRange ? onMouseLeave : null}
             showFixedNumberOfWeeks={showFixedNumberOfWeeks || showDoubleView}
             showNeighboringMonth={showNeighboringMonth}
             showWeekNumbers={showWeekNumbers}