Feature/reader skip duplicate chapters (#262)

* Skip duplicate chapters in the Reader

* Debounce "end of page" handling in the reader

* Update keyboard event listener

In case the "go" function changed, the listeners have to be updated

src/i18n/locale/en.json

@@ -304,6 +304,12 @@
       "next_chapter": "Next Chapter",
       "previous_chapter": "Previous Chapter"
     },
+    "error": {
+      "label": {
+        "unable_to_get_next_chapter_skip_dup": "Unable to get the next chapter - \"$t(reader.settings.label.skip_dup_chapters)\" option is enabled",
+        "unable_to_get_prev_chapter_skip_dup": "Unable to get the previous chapter - \"$t(reader.settings.label.skip_dup_chapters)\" option is enabled"
+      }
+    },
     "page_info": {
       "label": {
         "currently_on_page": "Currently on page",
@@ -321,6 +327,7 @@
         "load_next_chapter": "Load next chapter at ending",
         "reader_type": "Reader Type",
         "show_page_number": "Show page number",
+        "skip_dup_chapters": "Skip duplicate chapters",
         "static_navigation": "Static Navigation"
       },
       "reader_type": {
@@ -424,4 +431,4 @@
     },
     "title": "Updates"
   }
-}
+}