Show find icon instead of favicon

[Danielle Foré]

Instead of showing the search provider's favicon, the icon "edit-find-option-symbolic" should be shown in the SearchBar. This is more indicative of the function of this field and also shows that the icon allows you to select your default search provider.

[Allen Lowe (lallenlowe)]

also, the searchbar should be a tad wider, and the Hint should be greyed out

[Cris Dywan (kalikiana)]

A search-option-symbolic icon is actually used if no provider icon is available. But while I see that an indication of the choice would be desriable, I find a generic icon insufficient to tell me which search engine I actually selected.

[Cassidy James Blaede (cassidyjames)]

Not relevant to elementary since we use the address bar for search.