Note that toggling off spoiler formatting works if either all the
content inside, or the header (if it exists) or both are selected.
Co-authored-by: N-Shar-ma <bablinaneh@gmail.com>
Note that toggling off, only works for code blocks without a specified
language. So toggling formatting off only works for code blocks like:
```
code
```
and not:
```javascript
code
```
Co-authored-by: N-Shar-ma <bablinaneh@gmail.com>
This is a preparatory commit for new formatting buttons which are added
in the following commits.
Earlier we used multiple classes, each of which handled the hiding or
showing of the element it was applied to, at each breakpoint. Now all
the media queries of those classes have been combined into a new class,
for cleaner and more reusable code. This new combined media query is
also updated to accommodate the new formatting buttons.