Additional text properties

[kamfaima]

Is your feature request related to a problem? Please describe.
It would be nice if we have the option to:

• change font for both shape text and textbox
• Ability for individual pieces of text within shape text and textbox to be formatted differently. i.e. some text may be bold, others may be italicised and others, normal. Some text may be bigger than others.

Describe the solution you'd like
For changing the font, add the ability to change the font where existing text properties (e.g. bold, italics, etc) appear. For changing the format of the font, simply select the font and choose bold or italics or even change the size.

Additional context
As an example, the below image has text with a different (from Roboto Mono) font, different formatting and different size, all in the same textbox.