Fixed openning the popup
Support for tabs
Merge remote-tracking branch 'origin/openPopupFixedPosition' into tabs

* origin/openPopupFixedPosition:
  Fixed openning the popup
  Added tests for the font picker
  Fixed styling issues
  Made improvements for the custom option
  Fix the custom selection
  Fixed custom font
  Add the correct display name of the font
  Fixed styling issues of the two items in each item
  Configure the style of the font style dropdown and made a little change in dropdown comp so it can be injected with html
  Adding first unit-test for the styled dropdown in the font picker
  Starting to work on font picker style
Fixed arrow of the font picker when opened to the left
Merge remote-tracking branch 'origin/openPopupFixedPosition' into tabs

* origin/openPopupFixedPosition:
  Fixed arrow of the font picker when opened to the left
Style changes, new fixed offset
Tabs works #WIP
Fixes for borders
Fixed small issues with scroll
Adding new sprite to the accordion in case of tabs
Make small changes to the new sprite
Merge remote-tracking branch 'origin/master' into tabs

* origin/master:
  Update custom default font size
  Upgrade JS SDK version to 1.28.0
  Update README.md
  --amend
trigger scroll update when closing an accordion section
Change the the previous example settings.html
Adding tabs markdown
Tabs docs
Fixed border of the tabs
Merge branch 'tabs' of https://github.com/wix/wix-ui-lib into tabs
cleanups and added unit-test
Tabs example w/ scroll