Clear cache web view

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

@@ -4574,6 +4574,9 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                             properties.setHeight(message.id, null);
                             properties.setPosition(message.id, null, null);
 
+                            if (wvBody instanceof WebViewEx)
+                                ((WebViewEx) wvBody).clearCache();
+
                             if (itemId == R.string.title_fit_width && wvBody instanceof WebView)
                                 ((WebView) wvBody).getSettings().setLoadWithOverviewMode(enabled);
 

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

@@ -198,6 +198,10 @@ public class WebViewEx extends WebView implements DownloadListener, View.OnLongC
             });
     }
 
+    void clearCache() {
+        this.hash = null;
+    }
+
     void setOnPageLoaded(Runnable runnable) {
         Log.i("Set on page finished");
         onPageLoaded = runnable;