Slightly increase "thread state bar height" (#4162)
Slightly increase "thread state bar height" (#4162)

With the new features for thread dependency anaylsis,
the thread state bar becomes much more relevant.

While a major UI/UX rework is needed, this change slightly
improves the situation by increasing the height by 2 pixels.

Before:
http://screenshot/4qj2R6Q8y8yJYWu

After:
http://screenshot/8svzW5sGe3F4Tsx

Test: Compile & Run
google/orbit,google/orbit,google/orbit,google/orbit