support: Fix styling of plan details.
support: Fix styling of plan details.

The vertical allignment of billing method and downgrade plan
went a bit off in 41cb0476451b681df05206d494b38341c7c325d1

This commit should fix the allignment.

andersk/zulip,rht/zulip,hackerkid/zulip,zulip/zulip,hackerkid/zulip,punchagan/zulip,kou/zulip,andersk/zulip,zulip/zulip,zulip/zulip,rht/zulip,andersk/zulip,rht/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,kou/zulip,eeshangarg/zulip,andersk/zulip,hackerkid/zulip,rht/zulip,hackerkid/zulip,zulip/zulip,rht/zulip,kou/zulip,punchagan/zulip,rht/zulip,punchagan/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,eeshangarg/zulip,hackerkid/zulip,punchagan/zulip,zulip/zulip,andersk/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,andersk/zulip,rht/zulip,punchagan/zulip,eeshangarg/zulip,punchagan/zulip,eeshangarg/zulip,kou/zulip,eeshangarg/zulip