Add option to always hide check button

app/src/main/java/com/todoroo/astrid/activity/TaskEditFragment.java

@@ -176,7 +176,7 @@ public final class TaskEditFragment extends InjectingFragment
     title.setTextColor(themeColor.getColorOnPrimary());
     title.setHintTextColor(themeColor.getHintOnPrimary());
     title.setMaxLines(5);
-    if (model.isNew()) {
+    if (model.isNew() || preferences.getBoolean(R.string.p_hide_check_button, false)) {
       binding.fab.setVisibility(View.INVISIBLE);
     } else if (completed) {
       title.setPaintFlags(title.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);

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

@@ -302,4 +302,5 @@
   <string name="p_collapse_locations">collapse_locations</string>
   <string name="p_auto_dismiss_datetime_edit_screen">auto_dismiss_datetime_edit_screen</string>
   <string name="p_auto_dismiss_datetime_list_screen">auto_dismiss_datetime_list_screen</string>
+  <string name="p_hide_check_button">Hide check button</string>
 </resources>

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

@@ -583,4 +583,5 @@ File %1$s contained %2$s.\n\n
   <string name="calendar_event_created">Calendar event created for %s</string>
   <string name="select_all">Select all</string>
   <string name="share">Share</string>
+  <string name="hide_check_button">Hide check button</string>
 </resources>

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

@@ -147,6 +147,11 @@
       android:key="@string/p_back_button_saves_task"
       android:title="@string/back_button_saves_task" />
 
+    <SwitchPreferenceCompat
+      android:defaultValue="false"
+      android:key="@string/p_hide_check_button"
+      android:title="@string/hide_check_button" />
+
     <SwitchPreferenceCompat
       android:defaultValue="false"
       android:key="@string/p_show_task_edit_comments"