Minor UI improvements - Githubissues

I'll roll up smaller suggestions from Reddit, Twitter, and other issues into one bigger issue here:

[x] "Toggle" and "show/hide" are redundant XD Pick one!
[x] When you reach the bottom of a "toggle show/hide data table" block, have one last "row" with a button/link/something to collapse the giant table again so we don't have to scroll up to close it
[X] ~The longer entries in the "reason for participating" section are not auto-ellipses'd after x characters like the previous two tables were~ Actually, the answers are great. Let's keep it as is.
[x] ~Make the response count for each year a lot more visible, and earlier/higher up~ Not sure what I wanted back when from this one so marking it completd.
[x] Tooltips now show percentages but awkwardly formatted, nicer would be to have a format {absoluteNrOfResponses} ({percentage}%) or some such

jeroenheijmans / advent-of-code-surveys