IE11 / Edge keyboard compatibility (#2507)
IE11 / Edge keyboard compatibility (#2507)

https://github.com/FreshRSS/FreshRSS/pull/2506#issuecomment-523544684
marienfressinaud/FreshRSS,marienfressinaud/FreshRSS,Alkarex/FreshRSS,marienfressinaud/FreshRSS,FreshRSS/FreshRSS,romibi/FreshRSS,Alkarex/FreshRSS,romibi/FreshRSS,marienfressinaud/FreshRSS,FreshRSS/FreshRSS,aledeg/FreshRSS,romibi/FreshRSS,aledeg/FreshRSS,FreshRSS/FreshRSS,FreshRSS/FreshRSS,Alkarex/FreshRSS,romibi/FreshRSS,aledeg/FreshRSS,Alkarex/FreshRSS,aledeg/FreshRSS