dark-mode: Remove unnecessary CSS and fix dark mode bugs.
dark-mode: Remove unnecessary CSS and fix dark mode bugs.

kou/zulip,zulip/zulip,dhcrzf/zulip,kou/zulip,timabbott/zulip,tommyip/zulip,dhcrzf/zulip,rht/zulip,rht/zulip,shubhamdhama/zulip,kou/zulip,andersk/zulip,jackrzhang/zulip,andersk/zulip,punchagan/zulip,dhcrzf/zulip,showell/zulip,jackrzhang/zulip,zulip/zulip,mahim97/zulip,mahim97/zulip,punchagan/zulip,brainwane/zulip,shubhamdhama/zulip,synicalsyntax/zulip,dhcrzf/zulip,rishig/zulip,eeshangarg/zulip,rishig/zulip,brainwane/zulip,punchagan/zulip,eeshangarg/zulip,rishig/zulip,synicalsyntax/zulip,jackrzhang/zulip,showell/zulip,brainwane/zulip,eeshangarg/zulip,hackerkid/zulip,mahim97/zulip,shubhamdhama/zulip,showell/zulip,kou/zulip,synicalsyntax/zulip,shubhamdhama/zulip,rishig/zulip,rht/zulip,brainwane/zulip,hackerkid/zulip,tommyip/zulip,andersk/zulip,timabbott/zulip,jackrzhang/zulip,punchagan/zulip,eeshangarg/zulip,hackerkid/zulip,tommyip/zulip,kou/zulip,showell/zulip,rishig/zulip,rishig/zulip,zulip/zulip,tommyip/zulip,rht/zulip,brainwane/zulip,eeshangarg/zulip,zulip/zulip,brainwane/zulip,hackerkid/zulip,tommyip/zulip,timabbott/zulip,timabbott/zulip,punchagan/zulip,brainwane/zulip,hackerkid/zulip,synicalsyntax/zulip,timabbott/zulip,punchagan/zulip,shubhamdhama/zulip,synicalsyntax/zulip,eeshangarg/zulip,tommyip/zulip,dhcrzf/zulip,punchagan/zulip,synicalsyntax/zulip,andersk/zulip,andersk/zulip,rht/zulip,mahim97/zulip,timabbott/zulip,hackerkid/zulip,andersk/zulip,showell/zulip,zulip/zulip,dhcrzf/zulip,jackrzhang/zulip,mahim97/zulip,showell/zulip,showell/zulip,synicalsyntax/zulip,jackrzhang/zulip,andersk/zulip,zulip/zulip,zulip/zulip,eeshangarg/zulip,rishig/zulip,rht/zulip,shubhamdhama/zulip,shubhamdhama/zulip,kou/zulip,kou/zulip,tommyip/zulip,jackrzhang/zulip,hackerkid/zulip,rht/zulip,timabbott/zulip,dhcrzf/zulip,mahim97/zulip