Large organizations or users slow down ghfs significantly

[sirnewton01]

When navigating to a large organization (e.g. google or microsoft) it is very slow to iterate through the hundreds of repos. It blocks acme and continue to bog down ghfs after the the owner is loaded. The performance should be analyzed to consider any optimizations that may be possible.

Also, perhaps the loading of all of the repos for large organizations should be reconsidered. It wculd be worthwhile to load only the first 50/100 and allow the user to access specific named repos afterwards. If the user truly wants to look at all of the repos then there could be a special file (more) that can be opened to cause all of the repos to be loaded.