revert that change and to it at custom shapes level

to allow primitive rectangles still be used

Revert "disable round corners for rectangle shape. fixes fdo#39907"

This reverts commit 0c7bbbe9.

svx/source/svdraw/svdorect.cxx

@@ -184,7 +184,7 @@ void SdrRectObj::TakeObjInfo(SdrObjTransformInfoRec& rInfo) const
     rInfo.bGradientAllowed = (eFillStyle == XFILL_GRADIENT);
 
     rInfo.bShearAllowed     =bNoTextFrame;
-    rInfo.bEdgeRadiusAllowed=sal_False;
+    rInfo.bEdgeRadiusAllowed=sal_True;
 
     bool bCanConv=!HasText() || ImpCanConvTextToCurve();
     if (bCanConv && !bNoTextFrame && !HasText()) {