Shape Key export fails when the mesh is in Edit Mode

[glaforte]

The simple work-around is to switch to Object mode before exporting, but it did cause me some head-aches. When the export of a mesh with shape keys is done in Edit Mode, the vertex positions for all the shape keys are identical.

shape_key_export_bug.zip

1. Start Blender 2.79b, Load "PyramidShapes.blend".
2. Export a first time to see the Pyramid with the correct blend shapes in Godot.
3. In Blender, enter Edit Mode for the Pyramid.
4. Export a second time, open the COLLADA document in Godot: the shape keys are present, but there is no movement of vertices.