Add sections to the user's input

[rexkix]

This is the third of three issues. The goal is to make it so I don't need Notepad++ anymore and can use the TFC window instead. They probably are all for the v2 version of TFC.

Issue 3: Add sections to the user's input.

Once again, we're going way beyond Notepad++, but I thought of it and think it would be useful. To be fair, this one is total bonus. Do the "sticky lines" one and I'm a happy camper 99% of the time. Do the timer as well and I'm a happy camper 99.9% of the time. Do this and I'm super impressed and super happy.

If a line begins with "## SECTION", it defines the start of a new "section". The scroll bar would still have single line up/down controls, but it would also have multi-line up/down controls that would skip sections. This way, the user could have notes for one module that go for many lines and they could easily scroll through them to get to other notes.