subs: Make "All streams" link to appropriate hash.
subs: Make "All streams" link to appropriate hash.

This makes the “All streams” toggle bring the user to the hash
“streams/all” which saves their state.

Fixes: #5984.

brainwane/zulip,amanharitsh123/zulip,amanharitsh123/zulip,kou/zulip,showell/zulip,hackerkid/zulip,brockwhittaker/zulip,hackerkid/zulip,eeshangarg/zulip,brockwhittaker/zulip,jackrzhang/zulip,punchagan/zulip,vaidap/zulip,rht/zulip,zulip/zulip,tommyip/zulip,rishig/zulip,synicalsyntax/zulip,synicalsyntax/zulip,vaidap/zulip,zulip/zulip,kou/zulip,mahim97/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,eeshangarg/zulip,rht/zulip,shubhamdhama/zulip,zulip/zulip,Galexrt/zulip,hackerkid/zulip,synicalsyntax/zulip,verma-varsha/zulip,amanharitsh123/zulip,eeshangarg/zulip,brainwane/zulip,jackrzhang/zulip,punchagan/zulip,rishig/zulip,andersk/zulip,eeshangarg/zulip,rishig/zulip,verma-varsha/zulip,showell/zulip,kou/zulip,Galexrt/zulip,brockwhittaker/zulip,brainwane/zulip,andersk/zulip,jackrzhang/zulip,tommyip/zulip,hackerkid/zulip,showell/zulip,amanharitsh123/zulip,eeshangarg/zulip,andersk/zulip,tommyip/zulip,showell/zulip,jackrzhang/zulip,Galexrt/zulip,rishig/zulip,dhcrzf/zulip,rht/zulip,tommyip/zulip,zulip/zulip,andersk/zulip,timabbott/zulip,showell/zulip,rht/zulip,vaidap/zulip,mahim97/zulip,synicalsyntax/zulip,tommyip/zulip,dhcrzf/zulip,mahim97/zulip,mahim97/zulip,brockwhittaker/zulip,synicalsyntax/zulip,brainwane/zulip,jackrzhang/zulip,kou/zulip,verma-varsha/zulip,zulip/zulip,vaidap/zulip,showell/zulip,kou/zulip,dhcrzf/zulip,zulip/zulip,jackrzhang/zulip,synicalsyntax/zulip,dhcrzf/zulip,rishig/zulip,rht/zulip,Galexrt/zulip,timabbott/zulip,eeshangarg/zulip,timabbott/zulip,verma-varsha/zulip,hackerkid/zulip,Galexrt/zulip,Galexrt/zulip,brockwhittaker/zulip,rishig/zulip,punchagan/zulip,vaidap/zulip,shubhamdhama/zulip,rishig/zulip,timabbott/zulip,punchagan/zulip,Galexrt/zulip,rht/zulip,verma-varsha/zulip,amanharitsh123/zulip,timabbott/zulip,kou/zulip,timabbott/zulip,shubhamdhama/zulip,dhcrzf/zulip,punchagan/zulip,shubhamdhama/zulip,amanharitsh123/zulip,mahim97/zulip,timabbott/zulip,punchagan/zulip,verma-varsha/zulip,shubhamdhama/zulip,dhcrzf/zulip,andersk/zulip,punchagan/zulip,shubhamdhama/zulip,tommyip/zulip,brainwane/zulip,hackerkid/zulip,showell/zulip,brainwane/zulip,brainwane/zulip,jackrzhang/zulip,dhcrzf/zulip,andersk/zulip,kou/zulip,brockwhittaker/zulip,rht/zulip,shubhamdhama/zulip,tommyip/zulip,mahim97/zulip,vaidap/zulip,synicalsyntax/zulip,eeshangarg/zulip