Verticall scroll navigation and fix (#200)

* Remove scroll tracking from Page component

* Replace initial scrolling trigger with initialPage prop to be more clear on when to scroll to inital page

* Add current page tracking back to HorizontalPager

* Memoize prevChapter and nextChapter functions

* Rewrite navigation in vertical pager to scroll by screen percentage instead of whole pages, refactor code

* Handle last pages explicitly to fix issue with small last pages

src/typings.d.ts

@@ -114,10 +114,11 @@ interface IMangaChapter {
     chapter: IChapter
 }
 
-interface IPartialChpter {
+interface IPartialChapter {
     pageCount: number
     index: number
     chapterCount: number
+    lastPageRead: number
 }
 
 interface ICategory {
@@ -161,9 +162,10 @@ interface IReaderProps {
     pageCount: number
     setCurPage: React.Dispatch<React.SetStateAction<number>>
     curPage: number
+    initialPage: number
     settings: IReaderSettings
     manga: IMangaCard | IManga
-    chapter: IChapter | IPartialChpter
+    chapter: IChapter | IPartialChapter
     nextChapter: () => void
     prevChapter: () => void
 }