Layout change and show/hide functionality

[milenmk]

I wasn't delighted with the default layout, so I've made some changes to make it look better.

Main changes

• The layout is now responsive. All columns fit to page width.
• Changed the background for the columns to white and the records to grey
• The status title is now inside the container
• When using enums, if colour and icon are defined they will be visible
• Script to show/hide columns

With this modification, the look is like this:

Default

With hidden columns

• When a user clicks on the icon of a hidden column, the column will reappear and the record will be removed from the hidden items list

Hope you like it.

P.S.: I have invited you as collaborator to the forked repository