Add grid view to collection list

[emma-sg]

Closes #2498

Yay for consistency!

Changes

Adds a grid view to the collections list, alongside the default list view.

• Refactors edit dialog into collections-grid-with-edit-dialog component for dashboard — collections list already has its own edit dialog, so no need for this to be duplicated in the grid component
• Adds getter/setter for page property of pagination component, which fixes the dashboard not switching back to page 1 when switching between "Public" and "All" collection views

Manual testing

1. On the collections list page, click between "View as Grid" and "View as List" in the toolbar
2. Verify that pagination, the collection editing dialog, and the action menu works in grid view
3. On the dashboard in an org with multiple pages of collections, switch to the second page of "All" collections, then switch back to "Public" collections. Verify that the page search param disappears when switching between views.

Screenshots

Page	Screenshot
Collection list
Collection list (detail)

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Remaining things to do:

• Add full actions menu from list view to grid view, instead of just having pencil icon
• Reuse collection editing dialog from existing list view, instead of the grid view having its own separate dialog instance

[SuaYoo]

Looks great!