Allow Gathering Log to Be Sortable By Zone and Searchable

In addition to the current method of the gathering log being sorted by level, it would be nice to be able to sort it by zone to be able to easily see what types of things you can gather from a particular zone. Yes, you can click through and look at each item to see where to find it, but being able to see them organized in a different way would be quite useful, especially as the number of items you can gather increases.

Also, being able to search the list of gatherable items would be helpful as well (the same for the crafting window as well).