Incorrect behaviour when leaving a collapsed group with double-click

[Danil Sokolov]

To reproduce:
 - Create a Directed graph with 4 vertices: v0, v1, v2, v3
 - Add v0 and v1 into a group
 - Add the newly created group and v2 into a page pg0
 - Double-click the page pg0 to enter it
 - Select the group and make it collapsed (Is collapsed property)
 - Double-click the group to enter it (it will automatically expand)
 - Now double-click outside the group

Observed behaviour:
 - The current level become the topmost level of the model, where v3 is located

Expected behaviour:
 - Double-click outside the current group should bring us one level higher, in pg0 page