list_render: Extend test to verify that list sorting is case insensitive.
list_render: Extend test to verify that list sorting is case insensitive.

The alphabetic sorting of lists in the User/Organization settings was
changed in fa0a5ec to be case insensitive.
This commit makes changes to the list_render.js test to verify that the
sorting of these lists is indeed case insensitive.
showell/zulip,kou/zulip,tommyip/zulip,punchagan/zulip,showell/zulip,rishig/zulip,zulip/zulip,andersk/zulip,timabbott/zulip,brainwane/zulip,andersk/zulip,punchagan/zulip,synicalsyntax/zulip,timabbott/zulip,punchagan/zulip,rht/zulip,punchagan/zulip,showell/zulip,rht/zulip,eeshangarg/zulip,kou/zulip,timabbott/zulip,hackerkid/zulip,showell/zulip,hackerkid/zulip,rishig/zulip,kou/zulip,andersk/zulip,punchagan/zulip,brainwane/zulip,eeshangarg/zulip,showell/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,rishig/zulip,shubhamdhama/zulip,timabbott/zulip,zulip/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,eeshangarg/zulip,showell/zulip,rishig/zulip,tommyip/zulip,tommyip/zulip,shubhamdhama/zulip,zulip/zulip,timabbott/zulip,rht/zulip,shubhamdhama/zulip,brainwane/zulip,synicalsyntax/zulip,eeshangarg/zulip,tommyip/zulip,rht/zulip,showell/zulip,hackerkid/zulip,synicalsyntax/zulip,zulip/zulip,kou/zulip,punchagan/zulip,eeshangarg/zulip,rht/zulip,synicalsyntax/zulip,timabbott/zulip,zulip/zulip,rishig/zulip,timabbott/zulip,brainwane/zulip,shubhamdhama/zulip,hackerkid/zulip,synicalsyntax/zulip,shubhamdhama/zulip,rishig/zulip,tommyip/zulip,brainwane/zulip,synicalsyntax/zulip,tommyip/zulip,andersk/zulip,eeshangarg/zulip,synicalsyntax/zulip,shubhamdhama/zulip,rht/zulip,kou/zulip,tommyip/zulip,zulip/zulip,shubhamdhama/zulip,rht/zulip,brainwane/zulip,andersk/zulip,punchagan/zulip,kou/zulip,rishig/zulip,brainwane/zulip,eeshangarg/zulip,zulip/zulip