* Do some CSS and Migration guide cleanup
- More code snippet tweaks
- Fix some homepage hero bugs
- Do a cleanup on Migration guide content to highlight more changes and fix some issues from merge conflicts
* Remove not needed css form tooltip & popover as it is made by popper
Remove tooltip margin variable, as popper needs margin to be zero
* Remove popover left/top initializers as they are handled by popper
* nullify `margin` variable and add deprecation message
* Document change in migration guide
* Update _variables.scss
Co-authored-by: Mark Otto <markdotto@gmail.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>
* fix(reboot): revert hr styles to v4 implementation
* docs(cheatsheet): add a hr example
* fix(reboot): currentColor is the initial border-color value
* Document hr element in Reboot docs
* Update migration guide
* Update scss/_variables.scss
Co-authored-by: Mark Otto <markd.otto@gmail.com>
* Separate container classes from enable-grid-classes optoin
* Document the new option
* Mention in migration guide
Co-authored-by: XhmikosR <xhmikosr@gmail.com>