Crash on opening project with 1D and 2D data

1. open a new project
2. add 1D data
3. add 2D data (order is not important)
4. save project while DataView is opened
5. open the project --> failed assertion

Assertion d2Item() failed in GUI/View/Setup/AxesPanel.cpp, line 202.

changed milestone to %v22

added GUI crash labels

assigned to @m.svechnikov

mentioned in merge request !2773 (merged)

closed with commit 78a032c8

mentioned in commit 78a032c8