Fixed ghost track rotation on rear ends

Recalculation on track edit end
Changes rendering of ties to be evenly spaced
Fixes ghost and held track rendering

lib/context.ts

@@ -1,7 +1,7 @@
 type ContextStore = Record<string, any>;
 
-const contextStack: ContextStore[] = [];
 const defaultContext: ContextStore = {};
+const contextStack: ContextStore[] = [defaultContext];
 
 const debug = JSON.parse(localStorage.getItem("debug") || "false");