Many small adjustments

- Adjust header width for scrollbar presence
- Added new header assets for grass and dirt
- Adjusted styles for hosted and tracker
- Expand header to implement templating system
- Much more I have forgotten

WebHostLib/templates/hostRoom.html

@@ -6,7 +6,7 @@
 {% endblock %}
 
 {% block body %}
-    {% include 'cloudHeader.html' %}
+    {% include 'header/grassHeader.html' %}
     <div id="host-room">
         {% if room.owner == session["_id"] %}
             Room created from <a href="{{ url_for("viewSeed", seed=room.seed.id) }}">Seed #{{ room.seed.id|suuid }}</a>