Book Polishing (#639)

* Downgraded ExCSS, the new version has a regression that breaks toCss().

* Cleaned up the next/prev disabling to work more reliably.

Fixed an issue with double arrow on next not disappearing after hitting last page then going back one page.

* Cleaned up some css padding on the side nav progress bar

* Remove the ability to save

* Updated colors of nav bar and side drawer to be darker to separate them from the reader

* Fixed a missed element

* Removed dead code

* Removed TODO, it can't be changed

* Refactored bookmarking on the book progress to have pinpoint accuracy for remembering scroll position. Now will choose the top line on the page.

* Fixed a style issue when applying dark mode from light mode in book reader

UI/Web/package-lock.json

@@ -7392,7 +7392,8 @@
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       "resolved": "https://registry.npmjs.org/immediate/-/immediate-3.0.6.tgz",
-      "integrity": "sha1-nbHb0Pr43m++D13V5Wu2BigN5ps="
+      "integrity": "sha1-nbHb0Pr43m++D13V5Wu2BigN5ps=",
+      "dev": true
     },
     "import-fresh": {
       "version": "2.0.0",
@@ -9903,24 +9904,6 @@
         "json5": "^2.1.2"
       }
     },
-    "localforage": {
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-      "resolved": "https://registry.npmjs.org/localforage/-/localforage-1.9.0.tgz",
-      "integrity": "sha512-rR1oyNrKulpe+VM9cYmcFn6tsHuokyVHFaCM3+osEmxaHTbEk8oQu6eGDfS6DQLWi/N67XRmB8ECG37OES368g==",
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-          "resolved": "https://registry.npmjs.org/lie/-/lie-3.1.1.tgz",
-          "integrity": "sha1-mkNrLMd0bKWd56QfpGmz77dr2H4=",
-          "requires": {
-            "immediate": "~3.0.5"
-          }
-        }
-      }
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     "locate-path": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",