Add tooltips to flatdrawing create/edit forms

[xmedr]

Overview

This pr establishes a pattern for adding tooltips to document create/edit forms, starting with FlatDrawings. The forms are all handled by django-crispy-forms so we're adding tooltips and modals using JS after the form has been rendered.

• Closes Add tool tips to flat drawing page #133

Demo

Notes

My other thought was to have some kind of custom editable db solution, but it feels like this isn't something they're going to change very often so I went with this approach. I'm always open to suggestions if this isn't the case though!

Testing Instructions

• Start this branch locally, log in, and head to either the create or edit page for a flatdrawing
• Confirm that all tooltips appear for all relevant fields
• Confirm that the modals work as expected and display relevant headers and bodies

[xmedr]

The pattern here is:

• create a related static/js/tooltips/<modelname>.js script for the model
• add an obj with the keys being each field's label as defined by crispyforms' generated field ids (i.e. div_id_*), and values being an html string with the help text
• add tooltip button and modal html strings to the DOM for each label on the page
• add the resulting script to the model's form template

[xmedr]

The connected issue notes that CCFP isn't sure what the hash field is. I've kept it undefined for now and figure we can come back to add to it if/when we get some more info.

[antidipyramid]

Works great. Two small things:

1. I think it'd be good to add some extra line breaks in the tooltips with large blocks of text.

2. For links, a formatted link would be nice e.g. Interactive map of Sections

[xmedr]

Ah great point! I've got those changes in there now. Will merge after tests pass.