*CSR pinned on overview tab disappears on the first paint.
Cause
*Charts are automatically permanently disabled for charts that are initially empty
*This problem impacts any chart that is enabled in File => Preferences.
Details
*gGraph does not display layers (paint) when the layer is empty.
*gSummaryChart (layer) initializes empty to false and calculates empty during painting.
Causing empty charts to be permanently disabled.
*Once a chart has been displayed, it will always be displayed even if empty.
Solution
*Enabled painting charts when the DayRange is increased, triggering the empty flag to be recalculated
New non-empty charts will now be permanently displayed
*Overview maintains the largest DayRange used and list of empty charts.
*Overview receive these signals and calls recalculates when largest DayRange is increased.
*gSummaryChart implement recalculate method.
*gSummaryChart implement emit signal when empty flag changes.
*gGraphView implement emit signal when day range changes. (XBounds)
**** IMPORTANT MUST Rebuild makefiles.****
*Remove two Makefiles and execute qmake. (works for linux version).
