LHCb: fixes numbers in collection

* (closes #574)
UI: fixes UX "disabled" areas + bkgd-img in home

* hides “Explore XXX” button for “disabled” experiments
* (addresses #573)
* fixes background image in IE, Firefox (closes #567)
UI: fixes broken link in Record 101

* fixes ‘other_relationship_entry’ issue with repetitive/non-repetitive
links
* ( addresses #557)
templates: Make changes to validation (Closes #526)
templates: Update VM FAQ (Closes #522)
Update about.html
UI: fixes collection icon issue

* (closes #579)
* darkens a bit tags’ bkgd-color