Reduced conversation actions timeout

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

@@ -65,7 +65,7 @@ public class TextHelper {
     private static final float MIN_DETECT_PROBABILITY = 0.80f;
     private static final String TRANSLITERATOR = "Any-Latin; Latin-ASCII";
     private static final int MAX_CONVERSATION_SAMPLE_SIZE = 8192;
-    private static final long MAX_CONVERSATION_DURATION = 3000; // milliseconds
+    private static final long MAX_CONVERSATION_DURATION = 2500; // milliseconds
 
     private static final ExecutorService executor =
             Helper.getBackgroundExecutor(1, "text");