Revised terms and privacy consent dialog, analytics hooks (#1426)

* revised terms and privacy consent

* reorg code

* fix conditional

* Overlay reflects un-dissmissable state

* add inline scripts, and consent callback

* add csp_directive config hook

* revert config.yaml

* fix logic error

Co-authored-by: Colin Megill <colinmegill@gmail.com>

server/common/default_config.py

@@ -9,6 +9,7 @@ server:
   host: "127.0.0.1"
   port : null
   scripts : []
+  inline_scripts: []
   open_browser: false
   about_legal_tos: null
   about_legal_privacy: null
@@ -16,6 +17,7 @@ server:
   flask_secret_key: null
   generate_cache_control_headers: false
   server_timing_headers: false
+  csp_directives: null
 
 presentation:
   max_categories: 1000