`line graph` icon does not align correctly in a placeholder `Segment`
Bug Report
Steps
Create a placeholder Segment with Icon in the header. Set the Icon's name to line graph.
Expected Result
The line graph Icon should be centered in the Segment. (something like the pie graph Icon that can be seen in the image below)

Actual Result
The line graph Icon sticks to the left of the segment and a white box appears on the right side of the element.

Version
2.1.3
Testcase
for some reason, the code sandbox does not seem to run as expected
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I've been using Semantic UI React for quite some time now. I would be very glad if this issue gets assigned to me :)