Text embedding, hotkeys for tools.

[WubTheGame]

Is your feature request related to a problem? Please describe.
1: I'd like to be able to add more information to a note, either from the same moment or added later, without cluttering up the area
around that note.
2: Tools (Template, Insert, Format) are great, but easy to neglect at least for me. They feel out of the way.

Describe the solution you'd like
1: Embedding text into other text, so if you click on (optionally, just hover) the colored text you will see a popup containing additional information you put. See here for examples (citation points as alternative linked at the bottom of the page) https://www.ssbwiki.com/Air_dodge
2: Allow configuration of hotkeys for tools so they can be quickly accessed and used without the mouse.

Describe alternatives you've considered
1: The same thing, but you can just put a [1] (any number) where you want the embedded text and it'll be made small when you put text in it. I don't know what this is called other than a citation point.
2: I suppose they could also be added to the right click context menu? Wouldn't help me though xP

Versions:

• RedNotebook version 2.29.3
• Operating system and version: Windows 10 Pro 64-bit (10.0, Build 19045)

Thanks again in advance, I really appreciate this program. God bless ya, bro.

[jendrikseipp]

Regarding popping up extra text: this could be achieved easily if we ever make the switch to Markdown by using hidden Markdown boxes like in GitHub. They provide little arrows that when clicked reveal extra text.

Regarding extra shortcuts: sounds useful, yes. Pull requests welcome :-)