Fix/back button not working without browser history (#389)

* Introduce local history stack

To be able to know if the browser back navigation should be used, it is sometimes necessary to know which the previous page was.
E.g. it should not be used in case the current page is the manga page and the previous one is the reader.

* Handle cases where there is no previous page in the history stack

* Always use a button for the navigation back button

* Navigate from base route to library by replacing the current location

The base route should not be included in the history

src/components/navbar/ReaderNavBar.tsx

@@ -186,6 +186,13 @@ export default function ReaderNavBar(props: IProps) {
     }, [handleScroll]); // handleScroll changes on every render
 
     const handleClose = () => {
+        const isLastPageInHistory = location.key === 'default';
+
+        if (isLastPageInHistory) {
+            navigate(`/manga/${manga.id}`);
+            return;
+        }
+
         // this works because opening previous/next chapter will replace the current history element.
         // in case this gets changed this has to be updated
         navigate(-1);