OpenURL arrow should provide visual feedback on mouseover and/or look more button-like

[simon]

admittedly a very minor issue, but, while the functionality of the toolbar buttons is clear, it isn't quite as clear that the green OpenURL arrow is something you can click. perhaps it should highlight on mouseover, as the +/- creator buttons do.

[dstillman]

(In [696]) Cross-posting to BC for discussion: ​http://chnm.grouphub.com/projects/310105/msg/cat/2114872/3538662/comments

Changes as per my discussions with Dan:

• Separated snapshot functionality into two individual buttons, Create New Item From Current Page and Take Snapshot of Current page
• Updated schema to support primary, secondary and hidden item types (and future user customizations)
• Reorganized New Item menu, moving secondary items into sub-menu
• Removed ability to create link attachments, since it never really made much sense -- will simply use the webpage item type instead. Underlying functionality still exists for the time being, as people have existing links in their libraries--I think we're gonna have to just warn beta testers and delete them in a transition step, as converting nested links really wouldn't be worth the effort.
• Moved file link/add functions into new item menu and removed attachment drop-down
• Large, prominent View and Locate buttons in edit pane for going to an associated URL and looking up in OpenURL, respectively -- buttons gray out as appropriate
• New Item from Page stores the URL and access date (Item.save() checks for the string "CURRENT_TIMESTAMP" for accessDate and doesn't bind it as a string)
• "Website" to "Web Page" (do we prefer "Webpage"? they both look a bit funky in uppercase)

More coming.

Bugs/Known Issues:

• Since snapshots from the toolbar are now top-level in the current collection, there needs to be a way to drag them into items
• The camera icon for adding snapshots, despite being a famfamfam icon, really doesn't read too well (or perhaps just clashes with the rest of our icons). Anybody have a better one? (It also may be able to just be lightened up a bit.)
• Trying the large View/Locate buttons after discussions with Dan, but this approach may not work -- 1) a large View button for the URL makes a lot less sense when you have a parent item with a child snapshot, since people will end up clicking it all the time when they really want to view the snapshot, and 2) the Locate button is awfully big for something that only applies to certain types of items, may not get used very often when it does, and probably won't work when it is
• The access date is stored in UTC and displayed with toLocaleString() like Date Added and Date Modified, but, unlike those two, it's also user-editable. This is clearly a problem. Probably need to parse to Date on blur() with strToDate() and insert as UTC, discarding anything left over.
• Item type itself is still "website" -- should probably change that while we still can

Closes #253, OpenURL arrow should provide visual feedback on mouseover and/or look more button-like
Addresses #304, change references to "website" to "web page"
Addresses #207, openurl arrow functionality