[FIX][IMP] Make partner maps work properly

[FIX] website*: unfuck buggy controllers
[IMP] website*: display GoogleMap in a human-usable interface
[IMP] website_google_map: large module cleaning
      - There is now only one controller, data is sent once for all!
      - Map is now fully resizable in its hosting template
      - HTML/CSS cleaning
      - JavaScript is now human-readable ;-)

addons/website_google_map/static/src/css/google-map.css

@@ -0,0 +1,28 @@
+html {
+    height: 100%;
+}
+
+body {
+    margin: 0;
+    padding: 0;
+    height: 100%;
+}
+
+#odoo-google-map {
+    width: 100%;
+    height: 100%;
+}
+
+.marker {
+    font-size: 13px !important;
+}
+
+.marker a {
+    text-decoration: none;
+}
+
+.marker pre {
+    margin-top: 0;
+    margin-bottom: 0;
+    font-family: sans-serif !important;
+}