osu!catch - Remove SR inflation caused by wide buzz sliders

[Xinnoh]

https://puu.sh/CLXGg/34a2ad34c6.png
The pattern above is caused by standard mode converts having wide buzz sliders. The player can just stand in the center to catch everything. One or two of these buzz sliders can raise a map's SR from 4-5* to 7-11* on its own.

Sing's Master on this map just before kiai is an example and can be FCd.
While unplayable, Kaede is a bit silly to be listed as 27*

This issue needs fixing sooner rather than later because mappers for standard mode have had their maps DQd to change patterns to avoid causing this issue.

Sorcerer's proposed fix suggests the following:

• Check for direction change
• Check if distance of movement is <= catcher size
• Check if distance of current movement is equal to distance of previous movement
• Scale overall SR addition by time, 1.00x at 100ms down to 0.00x at 50ms