…ult, we onyl deliver the actual hint animation type now that should be used.

… using TVTHintData.HintText,

…s the hint text only using TCMHintShow.HintStr and at the end assignes the compiled hint to FHintData.HintText.

… now rely on the VCL base class THintWindow regarding this.

* Removed TVirtualTreeHintWindow.FDrawBuffer, we now paint on the canvas driectly
* Removed local variable Shadow, as it was never set to a value different from 0.
* Removed property TextHeight as it was never used.

* Turned property HintWindowDestroyed into a function
* Removed WMNCPaint)=, it seems to have no effect and the base implementation seems to work fine.
* TVirtualTreeHintWindow.WMShowWindow() no longer finalizes FHintData, should be done by the compiler just fine.

…atSystemDefault, we onyl deliver the actual hint animation type now that should be used.

…nt, now only using TVTHintData.HintText,

… now compiles the hint text only using TCMHintShow.HintStr and at the end assignes the compiled hint to FHintData.HintText.

…ed to hint animation, we now rely on the VCL base class THintWindow regarding this.

* Removed TVirtualTreeHintWindow.FDrawBuffer, we now paint on the canvas driectly
* Removed local variable Shadow, as it was never set to a value different from 0.
* Removed property TextHeight as it was never used.

* Turned property HintWindowDestroyed into a function
* Removed WMNCPaint)=, it seems to have no effect and the base implementation seems to work fine.
* TVirtualTreeHintWindow.WMShowWindow() no longer finalizes FHintData, should be done by the compiler just fine.

…emove the global variable FHintWindowDestroyed, which was needed for coordinating hint animations.

…e can also remove the global variable FHintWindowDestroyed, which was needed for coordinating hint animations.

* Removed no longer used protected property TVirtualTreeHintWindow.HintData
* It does not seem to be necessery to override TVirtualTreeHintWindow.WMEraseBkgnd()

* Removed no longer used protected property TVirtualTreeHintWindow.HintData
* It does not seem to be necessery to override TVirtualTreeHintWindow.WMEraseBkgnd()

…ssue #770 as it produced yellow backgrounds occasionally.

* Removed no longer used protected property TVirtualTreeHintWindow.HintData
* It does not seem to be necessery to override TVirtualTreeHintWindow.WMEraseBkgnd()

…ssue JAM-Software#770 as it produced yellow backgrounds occasionally.

… Related to issues #770 and #814.