Cache project options properly
Cache project options properly

Orphaned projects are only checked in Debug build

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