Moved remaining global execution functions to main

[BrokenEagle]

This one was missed when doing pull #27. I also commented the end to explicitly state where program execution starts.

[7nik]

Here is a problem: viewport and container in the ARTIST_QTIP_SETTINGS will have incorrect value. For container it isn't critical, it just resets to body. But for viewport it is, now the tooltips are always located below the tag even if there no enough space.

I see three ways to fix it:

• Set the properties in the addDanbooruArtist;
• Convert ARTIST_QTIP_SETTINGS to function;
• In initialize edit the constant ARTIST_QTIP_SETTINGS. ヽ(°〇°)ﾉ

[BrokenEagle]

I didn't see that dependency. Good catch!

For myself, I'd either add it in the initialize function, or extrapolate that whole thing into it's own function which I did with the follow-on commit.