'fixed' input of MdcTabBar should not change position of MdcTabIndicator

[pkurcx]

Describe the bug
'fixed' input of MdcTabBar component causes MdcTabIndicator changing position within DOM.
Tab with Indicator Spanning Only Content should be available with separate input option

Expected behavior
'fixed' should only indicates that the tab should shrink in size to be as narrow as possible

Screenshots
Without fixed:

With fixed:

What Angular MDC version are you using?
5.1.1

What OS are you using?:
x
What browser(s) is this bug affecting?:
x
Additional context
x