hello: Fix a header alignment issue when page is around 375px.
hello: Fix a header alignment issue when page is around 375px.

Fixes: #10771

This commit fixes the alignment of the header inside integration section
when page is around 375px of width.

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