GUI: gmodeler fix adding tool (OSGeo#4309)

* revert 2cf98da

* fix regression introduced in f99780c

gui/wxpython/gmodeler/model.py

@@ -941,8 +941,9 @@ def GetRelations(self, fdir=None):
 
         result = []
         for rel in self.rels:
-            if fdir == "from" and rel.GetFrom() == self:
-                result.append(rel)
+            if fdir == "from":
+                if rel.GetFrom() == self:
+                    result.append(rel)
             elif rel.GetTo() == self:
                 result.append(rel)
 
@@ -1577,7 +1578,7 @@ def _defineShape(self, width, height, x, y):
         :param width, height: dimension of the shape
         :param x, y: position of the shape
         """
-        ogl.EllipseShape(self, width, height)
+        ogl.EllipseShape.__init__(self, width, height)  # noqa: PLC2801, C2801
         if self.parent.GetCanvas():
             self.SetCanvas(self.parent.GetCanvas())
 
@@ -1592,7 +1593,7 @@ def _defineShape(self, width, height, x, y):
         :param width, height: dimension of the shape
         :param x, y: position of the shape
         """
-        ogl.CompositeShape(self)
+        ogl.CompositeShape.__init__(self)  # noqa: PLC2801, C2801
         if self.parent.GetCanvas():
             self.SetCanvas(self.parent.GetCanvas())