Draft: Draft_Split: apply original view props to split off object

Fixes #16210.

Note that `Draft.format_object` is called from gui_split.py (in the commit). This is not consistent with other tools where this is handled in the `make_*` functions. In this case the new object is formatted twice. The 1st time by the `make_wire` code which (wrongly) applies the current default props.

src/Mod/Draft/draftfunctions/split.py

@@ -33,22 +33,22 @@ import draftmake.make_wire as make_wire
 
 def split(wire, newPoint, edgeIndex):
     if utils.get_type(wire) != "Wire":
-        return
-    elif wire.Closed:
-        split_closed_wire(wire, edgeIndex)
-    else:
-        split_open_wire(wire, newPoint, edgeIndex)
+        return None
+    if wire.Closed:
+        return split_closed_wire(wire, edgeIndex)
+    return split_open_wire(wire, newPoint, edgeIndex)
 
 
 def split_closed_wire(wire, edgeIndex):
     wire.Closed = False
     if edgeIndex == len(wire.Points):
-        make_wire.make_wire([wire.Placement.multVec(wire.Points[0]),
+        new = make_wire.make_wire([wire.Placement.multVec(wire.Points[0]),
             wire.Placement.multVec(wire.Points[-1])], placement=wire.Placement)
     else:
-        make_wire.make_wire([wire.Placement.multVec(wire.Points[edgeIndex-1]),
+        new = make_wire.make_wire([wire.Placement.multVec(wire.Points[edgeIndex-1]),
             wire.Placement.multVec(wire.Points[edgeIndex])], placement=wire.Placement)
         wire.Points = list(reversed(wire.Points[0:edgeIndex])) + list(reversed(wire.Points[edgeIndex:]))
+    return new
 
 
 splitClosedWire = split_closed_wire
@@ -67,7 +67,7 @@ def split_open_wire(wire, newPoint, edgeIndex):
         elif index > edgeIndex:
             wire2Points.append(wire.Placement.multVec(point))
     wire.Points = wire1Points
-    make_wire.make_wire(wire2Points, placement=wire.Placement)
+    return make_wire.make_wire(wire2Points, placement=wire.Placement)
 
 
 splitOpenWire = split_open_wire