Documentation Improvements (#4894)

* Improvements for version banner

- Display at the bottom of the page
- Simplify text

* Use mkdocs version provider

* use 'navigation.instant'

* Support modern mkdocs features

- Much better navigation and improved features

* Content changes

* Add code to find previous versions

* Remove modern python syntax

* display output codes

* Hide version banner

* Extra debug message

* update terminology.md

docs/_includes/overrides/partials/version_banner.html

@@ -1,13 +1,13 @@
-{% if config.version_banner %}
+{% if False and config.version_banner %}
 <div class='alert alert-warning alert-dismissable alert-version' role='alert'>
     <div class='md-grid md-typeset'>
         <small>
         {% if config.readthedocs.version == 'latest' %}
-            This documentation is for the <em>development</em> version of InvenTree, which may be significantly different from the stable releases.
+            This documentation is for the <strong>development</strong> version of InvenTree.
         {% else %}
             This documentation is for an outdated version of InvenTree.
         {% endif %}
-        For <em>stable</em> release documentation, use the version selector located in the bottom right corner of this page.
+        For <strong>stable</strong> release documentation, use the version selector located in the bottom right corner of this page.
         </small>
         <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
     </div>