I am evaluating PhpStorm and so far I like it, but one issue in particular is preventing me from taking the plunge: it seems that the UI doesn't scale well in all areas for high-DPI screens (I am on a Dell XPS 15 9550 running Win 10 on a 4K screen). Specifically, trees with items that are expandable/collapsible, such as the project file navigation and the debugger variable explorer, are not scaling and are getting cut off. I have the setting enabled to override the default font size, which helps a little bit with font size scaling, but it doesn't really make these areas any more usable.
A screenshot is below; see how the bottom of the text is cut off and the icons (e.g. the PHP logo) in the project file navigation are tiny (as is the text in general). Has anybody experienced this issue, and is there a way to fix it?