night mode: Fix loss of border color on default style buttons.
night mode: Fix loss of border color on default style buttons.

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