Fixed original view scrolling issues

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

@@ -316,18 +316,20 @@ public class WebViewEx extends WebView implements DownloadListener, View.OnLongC
                 intercept = (yoff > 0 || dy >= 0) && (yoff < bottom || dy <= 0);
             }
 
-            int xrange = computeHorizontalScrollRange();
-            int xextend = computeHorizontalScrollExtent();
-            boolean canScrollHorizontal = (xrange > xextend);
-            if (canScrollHorizontal) {
-                int right = xrange - xextend;
-                int xoff = computeHorizontalScrollOffset();
-                int ldx = xoff - lastXoff;
-                float dx = lastX - event.getX();
-                intercept = (xoff > 0 || dx >= 0) &&
-                        (xoff < right || dx <= 0) &&
-                        (Math.signum(dx) == Math.signum(ldx));
-                lastXoff = xoff;
+            if (!intercept) {
+                int xrange = computeHorizontalScrollRange();
+                int xextend = computeHorizontalScrollExtent();
+                boolean canScrollHorizontal = (xrange > xextend);
+                if (canScrollHorizontal) {
+                    int right = xrange - xextend;
+                    int xoff = computeHorizontalScrollOffset();
+                    int ldx = xoff - lastXoff;
+                    float dx = lastX - event.getX();
+                    intercept = (xoff > 0 || dx >= 0) &&
+                            (xoff < right || dx <= 0) &&
+                            (Math.signum(dx) == Math.signum(ldx));
+                    lastXoff = xoff;
+                }
             }
         }
         getParent().requestDisallowInterceptTouchEvent(intercept || event.getPointerCount() > 1);