Using SW2016 on Windows 10 Pro. I can't figure out what's causing it, but something is causing interface components to grow. Toolbars get longer with extra dead space at the end; The orientation popup grows downward, and the feature manager grows to the right. All are shown below.
Restarting SolidWorks fixes the toolbars, but the orientation popup size and the feature manager sizes persist, and continue to get larger.