Quicktags Toolbar hide if nojs

[DeusTron]

Without javascript it looks better if the quicktags toolbar is hidden.

[sabernhardt]

toolbar shown without JavaScript but empty in WordPress 5.4 (Firefox)

[sabernhardt]

hiding the empty toolbar with hide-if-no-js class

[sabernhardt]

refreshed patch

[sabernhardt]

Thanks @DeusTron! I refreshed your patch.

Adding the class works, though the editor textbox might be a little too close to the post title box this way.

Without javascript it looks better if the quicktags toolbar is hidden.

Trac ticket: https://core.trac.wordpress.org/ticket/40570

[sabernhardt]

Since version 5.5, it has been possible to hide that container if you uncheck the "Disable the visual editor when writing" checkbox in your profile settings.

The title input's 3-pixel bottom margin is small for my preference, but my opinion doesn't matter as much because I have JavaScript enabled. 3 pixels is just enough for the :focus outline.

[sabernhardt]

Testing setup before applying the PR/patch:

1. Go to your Profile and check the box for "Disable the visual editor when writing" (if it's not already checked).
2. With JavaScript disabled and with the Classic Editor activated/enforced, open the post editor.
3. See the empty container between the title input and the content field.

After applying the fix, verify the container is no longer visible.

[Boniu91]

Confirmed the patch

[poena]

I have tested the pull request and it works well for me.

[desrosj]

In 50980:

Editor: Hide the quicktags toolbar when JavaScript is disabled.

This adds the hide-if-no-js class to the quicktags toolbar in the Classic Editor. This prevents an empty space from showing when JavaScript is disabled.

Props DeusTron, sabernhardt, Boniu91, poena.
Fixes #40570.