Fix a bug related to sharing
Fix a bug related to sharing

$item and $feed were not existing, replaced by other names.
Introduce by the merging of dev in extension branch.

superboum/FreshRSS,aledeg/FreshRSS,marienfressinaud/FreshRSS,asmundg/FreshRSS,Dolomich/FreshRSS,Dolomich/FreshRSS,Alkarex/FreshRSS,marienfressinaud/FreshRSS,superboum/FreshRSS,samuelstein/FreshRSS,aledeg/FreshRSS,Dolomich/FreshRSS,FreshRSS/FreshRSS,romibi/FreshRSS,romibi/FreshRSS,Alkarex/FreshRSS,marienfressinaud/FreshRSS,asmundg/FreshRSS,Alkarex/FreshRSS,Alkarex/FreshRSS,marienfressinaud/FreshRSS,superboum/FreshRSS,aledeg/FreshRSS,samuelstein/FreshRSS,FreshRSS/FreshRSS,asmundg/FreshRSS,aledeg/FreshRSS,FreshRSS/FreshRSS,romibi/FreshRSS,samuelstein/FreshRSS,romibi/FreshRSS,FreshRSS/FreshRSS