Tweak #8214 by avoiding renaming boot.css

Improves the continuity of our GitHub history

boot/boot.css.tid

@@ -1,3 +1,6 @@
+title: $:/boot/boot.css
+type: text/css
+
 /*
 Basic styles used before we boot up the parsing engine
 */

boot/tiddlywiki.files

@@ -25,11 +25,8 @@
 			}
 		},
 		{
-			"file": "boot.css",
-			"fields": {
-				"title": "$:/boot/boot.css",
-				"type": "text/css"
-			}
+			"file": "boot.css.tid",
+			"isTiddlerFile": true
 		}
 	]
 }