hScroll fixed: can ThumbScroll to the rightmost end of chart

TODO squeezing rate should be increased first
TODO larger vertical step on rightPriceGutter
+LastPositionOpenNow
Merge branch 'LastPositionOpenNow_tunnelDrawlabel_BarAnnotationSet' into v1.0-dev
+BarBack&ForeGroundGet()
Merge branch 'LastPositionOpenNow_BarBackForegroundGet_tunnelDrawlabel_BarAnnotationSet' into v1.0-dev

Conflicts:
	Sq1.Charting/ChartControl.DynamicVariables.cs