fixed PY-5196 Move statement: gets stuck on moving class after compound statement

python/testData/mover/class.py

@@ -0,0 +1,7 @@
+if condition:
+    test1()
+
+class B(Exception):
+    b=1
+clas<caret>s C:
+    pass

python/testData/mover/class_afterDown.py

@@ -0,0 +1,7 @@
+if condition:
+    test1()
+
+class B(Exception):
+    b=1
+clas<caret>s C:
+    pass

python/testData/mover/class_afterUp.py

@@ -0,0 +1,7 @@
+if condition:
+    test1()
+
+class C:
+    pass
+class B(Exception):
+    b=1