RMB should not create new page in the Inspector

[pavel-krivanek]

Bug description When you click on an item in the inspector with the right mouse button to open the context menu on the given item, in the right paginanator page it, it is interpreted as item selection and does not open the context menu (unlike the left pane).

To Reproduce Steps to reproduce the behavior:

1. (1->2) inspect
2. select key, new page over 1 is opened
3. RMB over decimal
4. new page (over an Association) is opened, no context menu is opened