New text formatting options

[popeadam]

Recently Power BI introduced Bold/italic/underline for text formatting

To incorporate this into a JSON theme, use:

"bold": true "italic": true "underline": true

...or:

"titleBold": true "titleItalic": true "titleUnderline": true

Not tested the italics and underline, but the 'bold' and 'titleBold' work...

[github-actions[bot]]

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