Fix tiddler icon size

[Jermolene]

As reported in the forum:

This observation is nitpicky and of low priority if considered a bug at all, but looks like an overlook, so I decided to ask.

The icon displayed in front of the tiddler title in the ViewTemplate has fixed, not relative, size. It stays the same size regardless of the title font size.

This is not visible at all on the default font size $:/themes/tiddlywiki/vanilla/metrics/fontsize of 14px, because the fixed size happens to be the same or very similar to the view toolbar icons. It is also not very apparent on small changes of the font size. Bigger changes of the font size, as in screenshots below, demonstrate the problem:

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated (UTC)
tiddlywiki5	✅ Ready (Inspect)	Visit Preview	Jul 20, 2023 4:39pm

[pmario]

IMO that's not a fix. It breaks the existing default behaviour.

See: tiddlywiki.com -- HelloThere -- 100% browser zoom

See preview -- HelloThere -- 100% browser zoom

[pmario]

IMO if you set both to 1em; it would scale in the same amount as the font-size

[Jermolene]

Thanks @pmario fix upcoming. We seem to need 0.9em to match the existing size

[pmario]

Thanks @pmario fix upcoming. We seem to need 0.9em to match the existing size

Yea, that's the problem with em CSS scaling if there are several elements that use em it gets unpredictable values.
That's why everyone prefers to use rem for new CSS projects now, because it always starts at the initial value.