Improved mobile view #151 (#150)

- fixed group by for mysql mode
- only user can edit own prefs
- updated installation README
- pagerfanta shows less links
- improved manual tab
- moved user profile link to pref tabs
- added menu links to top navbar
- moved page actions to breadcrumb position
- integrated daterangepicker and improved toolbar forms
- bugfix for time rounding

assets/css/vendor.scss

@@ -4,3 +4,4 @@ $fa-font-path: "~font-awesome/fonts";
 
 @import '~bootstrap-sass/assets/stylesheets/bootstrap';
 @import '~font-awesome/scss/font-awesome';
+@import '~daterangepicker/daterangepicker.css';