- replaced slimScroll to overlayScrollbars
- added new layout types (fixed, navbar-fixed & footer-fixed)
- changed old default layout from "fixed" to non-fixed
- enhanced PushMenu.js to load options via data
- enhanced Layout.js new layout calcs, options via data for scrollbar
- fixed forms fontawesome icons
- added warning-feedback (without icon)
- added sidebar-mini-md
- updated index to use layout-fixed
- updated index2 to use layout-fixed, layout-navbar-fixed & layout-footer-fixed

- fixed fontawesome icon rules in buttons, cards, sidebar & smallbox
- added calc for `.content-wrapper` min-height
- added layouts: top-nav, boxed & sidebar collapsed
- fixed mailbox attachment size
- added bg-*, navbar-*
- updated demo.js
- updated sidebar in demo files (added layout options)
- added autoprefixer to fix browser specific css changes
- added css sourcemap for adminlte.min.css

- added Modals Demo Page
- added Link to Modals in any other Demo Page
- added Modal Color Variation fixes
- updated zindex values `header` from 1000 to 900 `sidebar` from 1100 to 950 (below bootstrap 4 defaults to work with dropdown, modal, popover & tooltip)
- removed tooltip zindex overide