Making panel columns go full width on screen sizes smaller than xl.

[3Dgoo]

Currently the default panels stay in columns on small screen sizes. On small screens the screen is way too small to accomodate for this.

This change mages the default panels go full screen width on smaller screens.

[codecov]

Codecov Report

Merging #122 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #122   +/-   ##
=========================================
  Coverage     15.16%   15.16%           
  Complexity      156      156           
=========================================
  Files            16       16           
  Lines           455      455           
=========================================
  Hits             69       69           
  Misses          386      386

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