LocalStorage used bar

src/lib/utils.ts

@@ -75,7 +75,9 @@ export function download(filename: string, text: string, type: string = "text/pl
     }, 0);
 }
 
-export function getLocalStorageUsed(): number {
+export const MAX_LOCAL_STORAGE_MB = 5;
+
+export function getLocalStorageUsedMB(): number {
     var total = 0;
     for (const x in localStorage) {
         // Value is multiplied by 2 due to data being stored in `utf-16` format, which requires twice the space.