Enabled up nav

app/src/main/java/eu/faircode/email/ActivityAMP.java

@@ -62,6 +62,7 @@ public class ActivityAMP extends ActivityBase {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setIcon(R.drawable.twotone_bolt_24);
         getSupportActionBar().setSubtitle("AMP");
 

app/src/main/java/eu/faircode/email/ActivityDSN.java

@@ -47,6 +47,7 @@ public class ActivityDSN extends ActivityBase {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setSubtitle("DSN");
         setContentView(R.layout.activity_dsn);
 

app/src/main/java/eu/faircode/email/ActivityEML.java

@@ -108,6 +108,7 @@ public class ActivityEML extends ActivityBase {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setSubtitle("EML");
 
         View view = LayoutInflater.from(this).inflate(R.layout.activity_eml, null);

app/src/main/java/eu/faircode/email/ActivityError.java

@@ -44,6 +44,7 @@ public class ActivityError extends ActivityBase {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setSubtitle(getString(R.string.title_setup_error));
         setContentView(R.layout.activity_error);
 

app/src/main/java/eu/faircode/email/ActivitySignature.java

@@ -78,6 +78,7 @@ public class ActivitySignature extends ActivityBase {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         boolean monospaced = prefs.getBoolean("monospaced", false);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setSubtitle(getString(R.string.title_edit_signature));
 
         LayoutInflater inflater = LayoutInflater.from(this);

app/src/main/java/eu/faircode/email/ActivityWidget.java

@@ -82,6 +82,7 @@ public class ActivityWidget extends ActivityBase {
         int background = prefs.getInt("widget." + appWidgetId + ".background", Color.TRANSPARENT);
         int layout = prefs.getInt("widget." + appWidgetId + ".layout", 1 /* new */);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setSubtitle(R.string.title_widget_title_count);
         setContentView(R.layout.activity_widget);
 

app/src/main/java/eu/faircode/email/ActivityWidgetSync.java

@@ -59,6 +59,7 @@ public class ActivityWidgetSync extends ActivityBase {
         boolean semi = prefs.getBoolean("widget." + appWidgetId + ".semi", true);
         int background = prefs.getInt("widget." + appWidgetId + ".background", Color.TRANSPARENT);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setSubtitle(R.string.title_widget_title_sync);
         setContentView(R.layout.activity_widget_sync);
 

app/src/main/java/eu/faircode/email/ActivityWidgetUnified.java

@@ -96,6 +96,7 @@ public class ActivityWidgetUnified extends ActivityBase {
         boolean refresh = prefs.getBoolean("widget." + appWidgetId + ".refresh", false);
         boolean compose = prefs.getBoolean("widget." + appWidgetId + ".compose", false);
 
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setSubtitle(R.string.title_widget_title_list);
         setContentView(R.layout.activity_widget_unified);