Signature resume raw/monospaced

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

@@ -225,6 +225,12 @@ public class ActivitySignature extends ActivityBase {
         dirty = false;
     }
 
+    @Override
+    protected void onResume() {
+        super.onResume();
+        etText.setTypeface(etText.isRaw() ? Typeface.MONOSPACE : Typeface.DEFAULT);
+    }
+
     @Override
     protected void onSaveInstanceState(Bundle outState) {
         outState.putBoolean("fair:dirty", dirty);