Some text in the Editor displays in a very small font size

Some of the text in the Cascade editor in 4.18 is very small compared to other text in the Cascade editor. This was seen on a MacBook Pro with Retina display. It appears to be related to high resolution displays, since I was not able to reproduce this on a display that is not a high resolution display (using a MacPro and Windows machine).

REGRESSION:
Yes. This behavior did not occur in 4.17.2.

1. Open a project in the Editor.
2. Create a new cascade particle system.
3. Open the new particle system.

RESULT:
The text for the components in the Particle Emitter section is very small (see attached screenshot). Other text in the Cascade editor appears normal.

EXPECTED:
The text throughout the Cascade editor is the same size.