make organization classification a select2 dropdown

So you get suggestions of existing classifications but can also create
your own.
Needs styling.
remove unhelpful breadcrumbs from organization page header
ask for organization type if not present

and clicking on it activates editing mode
update html for items in tabs
JSON API -> Get this data as toolbar button text

Just a bit more friendly
display organization placeholder image on new org page

for layout consistency with new person and edit org page
only apply new org classification select2 on new org page

we need to set the classification to display in it on the view org page
but as we don't have that on the new page we need to handle it
differently to stop complaints about missing variables
reformat organization-edit.js to make later changes obvious
replace classification with select2 on org edit page

so we can see the list of existing classifications
we need to specifically hide the input as the code to turn on the
editing interface overrides some of the select2 setup code resulting in
the original input displaying and a confusing double display of the
selected value