Responsive table style fix

[maciaszczykm]

Fixed stylesheet issues for responsive tables:

• added paddings
• centered texts
• centered warning icon
• fixed overlay issue
• removed too big spacing between lines

Fixes #438 issue.

[codecov-io]

Current coverage is 81.76%

Merging #458 into master will not affect coverage as of 52836eb

@@            master    #458   diff @@
======================================
  Files           77      77       
  Stmts          625     625       
  Branches         0       0       
  Methods          0       0       
======================================
  Hit            511     511       
  Partial          0       0       
  Missed         114     114       

Review entire Coverage Diff as of 52836eb

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[bryk]

LGTM, merging :)