hotkey: Fix escape key when editing topic.
hotkey: Fix escape key when editing topic.

Apparently, the changes in fe2adeeee1c970b0a059aa3535bfbc7d8dc9d795 to
fix a Firefox focus bug accidentally had the side effect of removing
the topic text box from the area being considered, resulting in the
escape key no longer working to end the message edit from within that
text box.

rht/zulip,eeshangarg/zulip,timabbott/zulip,punchagan/zulip,eeshangarg/zulip,rht/zulip,timabbott/zulip,showell/zulip,shubhamdhama/zulip,brainwane/zulip,zulip/zulip,zulip/zulip,timabbott/zulip,showell/zulip,timabbott/zulip,brainwane/zulip,shubhamdhama/zulip,rht/zulip,timabbott/zulip,brainwane/zulip,showell/zulip,eeshangarg/zulip,synicalsyntax/zulip,hackerkid/zulip,rht/zulip,andersk/zulip,showell/zulip,brainwane/zulip,zulip/zulip,zulip/zulip,punchagan/zulip,synicalsyntax/zulip,synicalsyntax/zulip,showell/zulip,andersk/zulip,hackerkid/zulip,shubhamdhama/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,kou/zulip,synicalsyntax/zulip,shubhamdhama/zulip,kou/zulip,andersk/zulip,rht/zulip,punchagan/zulip,kou/zulip,synicalsyntax/zulip,shubhamdhama/zulip,zulip/zulip,synicalsyntax/zulip,showell/zulip,eeshangarg/zulip,showell/zulip,brainwane/zulip,synicalsyntax/zulip,brainwane/zulip,shubhamdhama/zulip,hackerkid/zulip,punchagan/zulip,eeshangarg/zulip,brainwane/zulip,andersk/zulip,rht/zulip,kou/zulip,shubhamdhama/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,rht/zulip,timabbott/zulip,timabbott/zulip,kou/zulip,punchagan/zulip,punchagan/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,zulip/zulip,hackerkid/zulip