Blender Git Loki

Fix T65301: Convert to mesh with Keep Original loses adjust operator panel.

We need to properly select new objects (and deselect 'source' ones) when
converting to another type while keeping original ones. Otherwise poll
check of the operator fails, and redo panel cannot be shown.

Note that this is actually a design flaw in redo system currently, since
*new* state has to still allow last operator to be ran, when it should
actually be previous step in history that matters here...