Size toggle for treetable and dominator tree / call graph panel

[IslinaS]

Currently we need to scroll right to see the size and / or percentage of total size information of various code chunks on the treetable. It would be great if we can: 1. make the treetable display flexible fit; 2. toggle the division between treetable and dominator tree panels left or right so that both size information columns can be displayed fully without scrolling.

https://threadit.app/thread/tnfphoo58c1m3685aeop