[Bug 56149] Cannot change the number of sides in a polygon

[DannyStaple]

Public bug reported:

Using: Ubuntu LTS 6.06, Dia 0.94

When the polygon tool is clicked to add a polygon to a page, you can
click enough to create a simple triangle. There is no apparent way to
add additional sides to the polygon, and nothing is mentioned in the dia
documentation.

I strongly suspect this is upstream.

It renders the polygon functionality virtually useless.

To reproduce:
* start dia
* Use the toolbar to select polygon
* Click on the canvas to create a polygon
* Try to find a way to get more than 3 sides to it.

** Affects: dia (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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Cannot change the number of sides in a polygon
https://launchpad.net/bugs/56149