fix navigate to out of range exception
fix navigate to out of range exception

cloudRoutine/VisualFSharpPowerTools,0x53A/VisualFSharpPowerTools,vasily-kirichenko/FSharpVSPowerTools,ovatsus/VisualFSharpPowerTools,fsprojects/VisualFSharpPowerTools,yever/VisualFSharpPowerTools,dedale/VisualFSharpPowerTools,xperiandri/VisualFSharpPowerTools,fsprojects/VisualFSharpPowerTools,isaacabraham/VisualFSharpPowerTools,enricosada/VisualFSharpPowerTools,enricosada/VisualFSharpPowerTools,bleis-tift/FSharpVSPowerTools,vasily-kirichenko/FSharpVSPowerTools,dkinitiate/VisualFSharpPowerTools,smoothdeveloper/VisualFSharpPowerTools,bleis-tift/FSharpVSPowerTools,cloudRoutine/VisualFSharpPowerTools,forki/FSharpVSPowerTools,bentayloruk/FSharpVSPowerTools,dungpa/PowerTools