- reduced title font size
- changed title & tools margins/paddings

typo fix on 'yarn add'

first changes to v3.0.0-rc.1

Migration the timeline component to "bootstrap 4".

- added part for fixed navbar/footer incl. the responsive classes
- added anchor info for fixed navbar
- added .dropdown-menu-lg/-xl info in main-header docs
- added custom plugin colors in layout colors part
  - custom-range
  - custom-switch
  - bootstrap slider
  - icheck-bootstrap

- fixed style
- created demo page
- created docs

- created CardRefresh Plugin
- created docs
- updated pages/UI/widgets.html

- renamed Widget to CardWidget
- renamed data-widget to data-card-widget
- reworked Selector & ClassName Icons to Option
- splited toggleMaximize to maximize & minimize
- added maximizeTrigger Option
- enhance code to run methods without buttons

enhanced css-compile with node-sass-package-importer and replaced ../../node_modules/bootstrap with ~bootstrap

- updated direct-chat-contacts background to $dark
- updated contacts-list-date & contacts-list-msg to $gray-400
- added direct-chat-contacts-light style

- removed setMargin in js
- fixed control-sidebar slide animate step
- added zindex-contro-sidebar
- added control-sidebar-push class
- updated zindex's