Reduced the technical debt around our JS flash function by making it a
module that is imported rather than relying on the global function.
The global function still exists mainly for technical debt with how
some requests are being completed, but new JS should import the module
directly.
Also reduces some tech debt in the file by removing the need for jQuery.
Instead Flash is now 100% vanilla JS.
Removes set favicon related methods from global scope
Improves test related with favicon
Removes convertPermissionToBoolean from global scope.
Adds tests for convertPermissionToBoolean - were non existant
Removes setParamInURL from gl.utils
Removes parseIntPagination from gl.utils namespace
Remove normalizeCRLFHeaders from gl.utils namespace
Removes normalizeHeaders from gl.utils namespace
Use gl.utils for filtered search
Fix bad import
Fix broken test by cleaning window.history namespace
Adds changelog
