Do I have to use IMCE?
No. Acquia Cohesion allows the site builder to select, either use of IMCE or Entity browser for browsing and selecting images.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
You can only add combinators to child selectors. Add a child selector and combinator will appear in the Style tree.
You have to upload a JSON file to provide the index of the icons within your chosen icon font.
You can style tables or forms through the use of base or custom styles.
You don't. You apply a Descendant selector. These use a (Space).