Issue #2510290 by rtdean93: Environment Indicator Variable list not in sync with Variable
Issue #2471923 by mparker17: Make favicon overlay optional
Issue #2345211 by conortm: Add git support to navbar
Issue #2381171 by ilkkave: Make it possible to include path in environment hostname
Issue #2312875 by robcolburn: Remove assets for anonymous users.
Issue #2301747 by jbrauer, e0ipso: Refactor git environment alter.
Issue #2289985 by bdone: Broken toolbar integration.
Fix static cache issue.
Issue #2284655 by e0ipso: Avoid caching for overridden environments.
Issue #2287983 by e0ipso: Missing class for empty environments.
Issue #2287983 by e0ipso: Prettify navbar integration.
Issue #2287983 by davereid: Add navbar support.
Issue #2287977 by e0ipso: Use git describe --all to find tag name.
Issue #2267361 by amitgoyal: Coding Style Issues.
Issue #2204685 by sender: Form validation for regular expressions.
Issue #2225691 by johnalbin and Elijah Lynn: Leftover code.
Issue #2256485 by ElijahLynn: Fix typo in permission descriptions.
Issue #2256475 by ElijahLynn: Minor documentation changes.
Issue #2246621 by nielsonm: Degrade jQuery calls to enhance compatibility.
Add --exact in the vset post commit hook.
Issue #2225667 by JohnAlbin: Alter hook not invoked.
Issue #2225703 by johnalbin: Suppress PHP warning because of the git command
Catch up with core development
Add cache around command_exists
Fixes some documentation information and typos
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