ELV create event dialog and other changes

[NathanCheshire]

Main changes being merged into master in combination with ELV PR:

• the whole create event dialog function
• create event card length check methods (change some numbers to prevent some missed overflowing)
• main scaffold work (fixed problem of cutting off bottom events that resulted from the entire view being wrapped in a singlechildscrollview; this was done to fix the issue of overflow for the create event dialog but is no longer needed as both issues have been resolved)
• might be some other important code (you'll have to see from changes list), but those are the main points I can think of

[JustinASmith]

Great job @NathanCheshire! 👍