Revert "typeahead: Tab opens typeahead if not open with a non-empty input."
Revert "typeahead: Tab opens typeahead if not open with a non-empty input."

This reverts commit 0e2c509a243858510d52f6afe8025f8cc39cb698.

rishig/zulip,zulip/zulip,kou/zulip,brainwane/zulip,tommyip/zulip,rishig/zulip,rht/zulip,zulip/zulip,dhcrzf/zulip,brainwane/zulip,timabbott/zulip,hackerkid/zulip,shubhamdhama/zulip,shubhamdhama/zulip,andersk/zulip,jackrzhang/zulip,eeshangarg/zulip,tommyip/zulip,jackrzhang/zulip,zulip/zulip,tommyip/zulip,eeshangarg/zulip,kou/zulip,shubhamdhama/zulip,dhcrzf/zulip,rht/zulip,punchagan/zulip,punchagan/zulip,andersk/zulip,jackrzhang/zulip,showell/zulip,timabbott/zulip,hackerkid/zulip,dhcrzf/zulip,kou/zulip,brainwane/zulip,brainwane/zulip,rht/zulip,dhcrzf/zulip,hackerkid/zulip,dhcrzf/zulip,andersk/zulip,tommyip/zulip,synicalsyntax/zulip,brainwane/zulip,showell/zulip,shubhamdhama/zulip,punchagan/zulip,andersk/zulip,synicalsyntax/zulip,showell/zulip,shubhamdhama/zulip,hackerkid/zulip,eeshangarg/zulip,jackrzhang/zulip,kou/zulip,showell/zulip,eeshangarg/zulip,zulip/zulip,rht/zulip,brainwane/zulip,rishig/zulip,shubhamdhama/zulip,tommyip/zulip,eeshangarg/zulip,tommyip/zulip,rht/zulip,timabbott/zulip,rishig/zulip,tommyip/zulip,synicalsyntax/zulip,andersk/zulip,punchagan/zulip,rishig/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,punchagan/zulip,zulip/zulip,showell/zulip,dhcrzf/zulip,eeshangarg/zulip,rht/zulip,zulip/zulip,synicalsyntax/zulip,kou/zulip,showell/zulip,jackrzhang/zulip,andersk/zulip,hackerkid/zulip,jackrzhang/zulip,hackerkid/zulip,jackrzhang/zulip,andersk/zulip,timabbott/zulip,shubhamdhama/zulip,showell/zulip,punchagan/zulip,brainwane/zulip,timabbott/zulip,timabbott/zulip,rishig/zulip,zulip/zulip,synicalsyntax/zulip,synicalsyntax/zulip,timabbott/zulip,dhcrzf/zulip,rht/zulip,kou/zulip,eeshangarg/zulip,synicalsyntax/zulip,rishig/zulip