1. show progress "spinner" for heavy query
2. show "staleness" sign
3. fix index pick select box hover cutting text
4. fix query stats Index Explain and Etag fields
5. after performing query, gain focus on query field
Merge branch 'master' of https://github.com/ayende/ravendb into RavenDB-2857

Conflicts:
	Raven.Studio.Html5/Content/app.less
	Raven.Studio.Html5/Content/app.min.css
do not try to get suggestions if it's dynamic query