It looks like something is wrong with resizing columns in edit tabs.
For example: Tables -> any table -> Open -> choose "Statistics" tab and try resize (narrow) columns.
(a) Sometimes on the tab "Statistics" I can see only one horizontal scroll bar (below grid "Column statistics") which scrolls both upper and lower grid at the same time.
(b) Expanding column in upper grid causes the second one scroll bar appears attached to upper grid
(c) Narrowing column in upper grid works until the upper scroll bar is visible and stops working when the scroll bar dissapears