Mouse over tab captions for JvDockVIDStyles

Following this question on SO: http://stackoverflow.com/questions/20246485/jvdocktabpagecontrol-show-form-caption-in-hint-on-tab-mouseover

JvDockVIDStyle and its descendants create very small tabs with ellipses when the caption is truncated. This change adds the option to display the full caption in a hint as you mouseover the tabs.