Tiptap inline blocks in RTE should inherit stylesheets from the editor

[z7-matt]

When adding a custom block view in the RTE in Tiptap at the moment you have to load the stylesheets in the custom block view yourself. I imagine in a lot of use cases for inline blocks the styles are coming from somewhere else since the frontend rendering is in cshtml rather than lit. At the very least some customisable way to add CSS stylesheets defined in the backoffice, or maybe inheriting the stylesheets from the rich text editor entirely would help.

Additionally, the edit button is very difficult to manage since it's always set to float on top of the block. For things like buttons this makes the text difficult/impossible to read.