Clean up some tablet dimension values

app/src/main/res/layout-sw720dp/manga_controller.xml

@@ -26,7 +26,7 @@
                 app:layout_constraintEnd_toStartOf="@id/chapters_recycler"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toTopOf="parent"
-                app:layout_constraintWidth_max="450dp"
+                app:layout_constraintWidth_max="@dimen/tablet_sidebar_max_width"
                 app:layout_constraintWidth_percent="0.5"
                 tools:itemCount="1"
                 tools:listitem="@layout/manga_info_header" />

app/src/main/res/values-sw600dp/dimens.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <dimen name="screen_edge_margin">24dp</dimen>
-</resources>

app/src/main/res/values-w820dp/dimens.xml → app/src/main/res/values-sw720dp/dimens.xml

@@ -5,4 +5,6 @@
     <dimen name="activity_horizontal_margin">64dp</dimen>
 
     <dimen name="bottom_sheet_width">480dp</dimen>
+
+    <dimen name="screen_edge_margin">24dp</dimen>
 </resources>

app/src/main/res/values/dimens.xml

@@ -1,6 +1,5 @@
 <resources>
     <dimen name="activity_horizontal_margin">16dp</dimen>
-    <dimen name="activity_vertical_margin">16dp</dimen>
 
     <dimen name="bottom_sheet_width">0dp</dimen>
 
@@ -15,4 +14,5 @@
     <dimen name="screen_edge_margin">16dp</dimen>
 
     <dimen name="tablet_horizontal_cover_margin">128dp</dimen>
+    <dimen name="tablet_sidebar_max_width">450dp</dimen>
 </resources>