[Fix] UI Fixes (#266)

Rather than have a bunch of pull-requests that @jebus will have to merge shall we collect some of the fixes for the UI issues I found in here.

- [x] #259
- [x] #260
- [x] #261
- [x] #262
- [x] #263
- [x] #264
- [x] #265

Co-authored-by: Tobias O <tobias.olenyi@envipath.com>
Reviewed-on: enviPath/enviPy#266
Co-authored-by: Liam Brydon <lbry121@aucklanduni.ac.nz>
Co-committed-by: Liam Brydon <lbry121@aucklanduni.ac.nz>

templates/static/contact.html

@@ -49,7 +49,7 @@
                 <a
                   href="https://community.envipath.org/"
                   target="_blank"
-                  class="btn btn-secondary"
+                  class="btn btn-neutral"
                   >Visit Forums</a
                 >
               </div>
@@ -81,7 +81,7 @@
                 <a
                   href="https://wiki.envipath.org/"
                   target="_blank"
-                  class="btn btn-accent"
+                  class="btn btn-neutral"
                   >Read Docs</a
                 >
               </div>