Add option to disable collapsing app bars

app/src/main/java/com/todoroo/astrid/activity/TaskListFragment.kt

@@ -231,6 +231,10 @@ class TaskListFragment : Fragment(), OnRefreshListener, Toolbar.OnMenuItemClickL
             binding.toolbar.navigationIcon = null
             binding.bottomAppBar
         }
+        if (!preferences.getBoolean(R.string.p_app_bar_collapse, true)) {
+            binding.bottomAppBar.hideOnScroll = false
+            (binding.toolbar.layoutParams as AppBarLayout.LayoutParams).scrollFlags = 0
+        }
         toolbar.setOnMenuItemClickListener(this)
         toolbar.setNavigationOnClickListener { callbacks.onNavigationIconClicked() }
         setupMenu(toolbar)

app/src/main/res/layout/fragment_task_list.xml

@@ -74,7 +74,6 @@
       android:theme="?attr/overlay_theme"
       app:popupTheme="@style/popup_overlay"
       app:hideOnScroll="true"
-      app:layout_scrollFlags="scroll|enterAlways"
       app:navigationIcon="@drawable/ic_outline_menu_24px" />
 
   <com.google.android.material.floatingactionbutton.FloatingActionButton

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

@@ -446,4 +446,5 @@
   <string name="p_picker_mode_time">picker_mode_time</string>
   <string name="p_markdown">markdown</string>
   <string name="p_app_bar_position">app_bar_position</string>
+  <string name="p_app_bar_collapse">app_bar_collapse</string>
 </resources>

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

@@ -708,6 +708,7 @@ File %1$s contained %2$s.\n\n
   <string name="markdown_description">Enable Markdown in title and description</string>
   <string name="completion_sound">Play completion sound</string>
   <string name="app_bar_position">App bar position</string>
+  <string name="app_bar_collapse">Collapse app bars</string>
   <string name="top">Top</string>
   <string name="bottom">Bottom</string>
   <string name="completed">Completed</string>

app/src/main/res/xml/preferences_look_and_feel.xml

@@ -62,6 +62,11 @@
       android:entryValues="@array/two_values"
       android:title="@string/app_bar_position" />
 
+    <SwitchPreference
+      android:defaultValue="true"
+      android:key="@string/p_app_bar_collapse"
+      android:title="@string/app_bar_collapse" />
+
     <SeekBarPreference
       android:defaultValue="16"
       android:key="@string/p_fontSize"