Added styling for CSS classes: .sticky, .gallery-caption, .bypostauthor and .aligncenter
Improved styling for .bypostauthor
Add content width variable as recommended by the theme check plugin
Merge branch 'master' of https://github.com/trendwerk/trendpress-child

# By Derrik Wolthuis
# Via Derrik Wolthuis
* 'master' of https://github.com/trendwerk/trendpress-child:
  Remove bloody comma's
  Removed comma's added better style tags
  Added highlight for current menu items widget
  Tweaked styling a bit
  Style for tags in meta paragraphs
  Minor tweaks Gravity Forms error messages