Improve suggestion field search

Problem to solve

The search popup when for example typing # for issues is not pretty good. You can type a number and a word, that is all. The problem is when trying to find an issue by title with common words that need to be combined to find that issue. This does not work, because one needs to enter a space to search for multiple words, which does not work in the popup search.

Proposal

Improve search similar to GitHub: Searching works for multiple words without need of a space between them. That way you can type anytemplateissue and find results for issues with any template issue in the title.