Also fixed the tooltip text up
Also fixed a bug caused by SameLinkSprites where "this" is actually supposed to be included by just adding a manual function call.
Also moved the overhead for finding all sprites in the same line that reference the same URL to the LoadComplete (used to be every hover, now only once).
Implemented it to be used when adding text to an OsuLinkTextFlowContainer.
Fix filename casing to compile on Linux
Fix crash when all beatmaps in a set are hidden