The Draft_Wire command can combine selected Draft_Wires and Draft_Lines into a single wire. This function did not always behave properly.
* Edges were not sorted, the result could have a different shape (with the correct vertexes).
* If edges formed a closed shape the resultant wire was not closed.
These messages were perhaps originally intended as a debuggin aid but now add clutter to the output panes. Remaining messges are mostly the result of methods to display attributes of an object (which one could call from the Python console) or actually provide some information which would not be obvious from the circumstances
- If grid is on and auto grid on: Grid always appears
- If grid is on and auto grid off: Grid off at start, on when using a tool, off afterwards
- If grid is off: Grid never appears
In Python 3 `super()` can be used without an argument
in order to get the parent class, `super()`.
In Python 2 the present class must be used as an argument,
`super(ThisClass, self)`.
This commit is done to support Python 2,
as without it all Gui Command tools will be broken
and will fail to launch, even if the unit tests pass.
Also, set the `__metaclass__` variable to `type`.
This is done to turn all classes into "new style" classes
in Python 2. This is required so `super()` works correctly
in this version of Pyton.
This commit can be reverted once Python 2 support
is completely dropped, and only Python 3 compatible code
is used.
