I would be fine with the workflow (if this bug occours): to make the panel wider to re-align the left side.
But currently, I can make it as wide as I can - there is enough space for all content, but the wrong left alignment remains.

A scroll bar would also be fine, if one has not so much space and wants to see/scroll in a specific part of the tree.

At least - or probably [i]the best solution[/i]: the selected item (on selecting it) should be scrolled automatically into view, as it is expected for every element in any browser.
Thus, I can always select a top-level item to re-align the tree to the left.

The Media Tree is missing a horizontal scroll: https://www.ventismedia.com/mantis/view.php?id=15757

I have in the left panel the "Media tree" and the "Playing list" (big monitor).
It happened that the content scrolled to the right (I don't know exactly what I did), but now I cannot scroll it back to the left - I don't see the content anymore correctly:
[img]https://stilletanzen.de/images/MM-Scroll-Fehler.jpg[/img]

Even moving with the cursor (in both windows) and editing the entries did not scroll them into view.
What to do? Should be possible...

Only closing the App and restarting it did solve the problem.

Debug version of MM (portable) 5.1.0.2832 on Win10-PC.