Fix claims.

Use OID instead of email for microsoft identifier.
Fix PlayerCount route.
Add created date to user table.
Create spectator icon.

Shogi.UI/wwwroot/css/app.css

@@ -44,13 +44,6 @@ button {
 	font-size: smaller;
 }
 
-
-
-
-
-
-
-
 #app {
 	display: grid;
 }
@@ -107,7 +100,7 @@ p {
 }
 
 /* Variables */
-:root {
+html {
 	--primary-color: #444;
 	--secondary-color: #5e5e5e;
 	--contrast-color: #eaeaea;