Add search box options for forum home

[Sim]

When viewing the forum home page, the search box presents a minimal interface which allows you to perform a site-wide search:



I think it would enhance the user experience if we added the dropdown option to select what to search, like we get in forums/threads:



... where the search options mimic those in the advanced search tabs:



So the dropdown would have the following options (dynamically populated based on installed addons):

• Everywhere
• Threads
• Media
• Media comments
• Resources
• Profile posts
• Tags

... that way users can quickly perform a more targeted search from the search box, rather than needing to go to the advanced search page.