If that's not possible, at least small icons should be visible to see:
which TAB is disabled,
which is locked
which is changed and need to be deployed
Also this very useful drop-down-list should reach the bottom, not just half of the screen.
(Set height to max)
I've just realized how much time it takes to disable all tabs one by one, if trying to test a new node which would conflict with the current one.
The base-concept of NR is to use many TABs = flows, to be organized more nicely, not to put many nodes on a few Tabs.
But scrolling tabs horizontally to find which tab needs to be enabled / disabled is currently not so practical.
For the list, that would be a normal tree layout. For the tabs themselves, It would either need to add another row above (which I suspect most people wouldn't like) or something similar to the way that grouped tags work in the Edge browser:
A "pill" is shown before the group with a colour and a narrow line of the same colour above the grouped tabs. In edge, the group can be collapsed simply by clicking on the pill.
Would need a new key, set manually when needed
This really enhances usability if you have a lot of tabs. At the moment, you can only hide tabs and then you have to unhide them if you want to access them. With grouping, you only need to click on the pill to collapse/expand the group.
This could also be integrated with PizzaProgram's suggestion so that you could dis-/en-able a complete group of tabs.