Changes the name of our spacing variables due to the prefixing -/_
meaning private in the use of new "use" rather than include.
All now modular too, so all variables/mixins are accessed via their
package.
Also renamed variables file to vars for simpler/cleaner access/writing.
eg. '$-m' is now 'vars.$m'
- Prevented image toolbars showing for objects embeds due to tinymce
image placeholder, and added media toolbar.
- Fixed height of object embed placeholder being forced to auto
when in the editor, allowing height attributed to be properly
reflected as it would on normal page view.
Closes#4974
Inline with A11y recommendations where color may not be reliable on its
own.
Tested various content link scenarios across chrome, safari & FF.
For #4939
Required a lot of working around TinyMCE since it added a
preview/wrapper element in the editor which complicates things.
Added view new "fixes.js" file so large hacks to default TinyMCe
functionality are kept in one place.
