Show users in stacked bar graph for daily activity if only 1 game is selected

[keitharm]

To make more use of the stacked bar graph, show the users that contributed to that game's playtime for the day.

[jfwu90]

Certainly possible. Some edge cases to consider:

• if bar is very short for one day, it'll be impossible to scroll over the users. Perhaps max length should be taken into account and users are only shown if they take up more than __% of the max length
• number of users displayed need to be limited so that this will scale properly. Perhaps only show users that play more than __% in a given day, and then group the rest into Other