Make markdown headers bold in Edit view

[johandicap]

What

I suggest making markdown headers bold in the Edit view of the mobile app like it is currently done in the desktop app, see screenshots below.

Why

When scrolling through a long note, bold headers make it much easier to see where new sections begin.
Also, it aligns the look of the mobile app with the desktop app.

Mac app with bold headers

iOS app without bold headers

[peril-automattic]

	Fails
🚫	Please add a type label to this issue. e.g. '[Type] Enhancement'

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[peril-automattic]

	Fails
🚫	Please add a type label to this issue. e.g. '[Type] Enhancement'

Generated by 🚫 dangerJS

[johandicap]

Fails
🚫
Please add a type label to this issue. e.g. '[Type] Enhancement'

Generated by 🚫 dangerJS

I don't think I have the permission to add labels (at least now, after the creating of the issue), but some labels that might be relevant are:

• [feature] editor
• [feature] markdown

Feel free to add these to the Feature Request :)