Better search (Boolean operators)

[sonofjon]

The app could use improved search functionality. IMHO it urgently needs Boolean search operators:

http://websearch.about.com/od/2/g/boolean.htm

Example:

Search for: tag:android backup

Expected result: All bookmarks tagged "android" and including the word "backup" in the title.

Actual result: All bookmarks tagged "android backup".

Note that switching the order of the search terms currently gives the expected result, i.e. searching for: backup tag:android

Functionality needed are: AND, OR, and NOT operators (recommendation: use Google default syntax, e.g. + and - for AND and NOT operators).

https://support.google.com/websearch/answer/2466433?hl=en&rd=1

Also quotation marks should be used to search for phrases (multiple word sentences). Without quotation marks a multiple word search should default to an AND search.

See also: #112