Use LocalStorage to preserve dashboard collapse state

[atuttle]

Relates to #259 - it would be great if we could remember which fields you have expanded.

We should think about how granular this should be. Should we make it resource-specific? resource+verb specific?

[coryasilva]

Could we even go a little more coarse and group resources by there root path? Admittedly this would have to be tastefully done for apis with many different root resource paths...

[atuttle]

Do you just mean the order of the item rows in the dashboard?

[coryasilva]

No I mean to group them like this:

- /groups

/groups
/groups/:id
/groups/:id/users
/groups/:id/members
/groups/:id/membersof

+ /pages

+ /widgets

- /users

/users
/users/:id
/users/:id/settings

[atuttle]

Interesting. It could be done, because they are in reverse Alpha order
(displayed in matching order).