Fixed web view scaling

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

@@ -1531,11 +1531,17 @@ public class HtmlHelper {
     static void setViewport(Document document) {
         // https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag
         Elements meta = document.head().select("meta").select("[name=viewport]");
-        if (meta.size() > 0) {
+        if (meta.size() == 1) {
+            String content = meta.attr("content")
+                    .toLowerCase()
+                    .replace(" ", "")
+                    .replace("user-scalable=no", "user-scalable=yes");
+            meta.attr("content", content);
+        } else {
             meta.remove();
-            document.head().prependChild(document.createElement("meta")
+            document.head().prependElement("meta")
                     .attr("name", "viewport")
-                    .attr("content", "width=device-width, initial-scale=1.0"));
+                    .attr("content", "width=device-width, initial-scale=1.0");
         }
 
         Log.d(document.head().html());

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

@@ -49,7 +49,7 @@ public class WebViewEx extends WebView implements DownloadListener, View.OnLongC
 
         WebSettings settings = getSettings();
         settings.setUseWideViewPort(true);
-        settings.setLoadWithOverviewMode(true);
+        settings.setLoadWithOverviewMode(false);
 
         settings.setBuiltInZoomControls(true);
         settings.setDisplayZoomControls(false);
@@ -75,7 +75,7 @@ public class WebViewEx extends WebView implements DownloadListener, View.OnLongC
 
         this.height = (height == 0 ? getMinimumHeight() : height);
 
-        setInitialScale(size == 0 ? 1 : Math.round(size * 100));
+        setInitialScale(size == 0 ? 0 : Math.round(size * 100));
 
         if (position != null) {
             setScrollX(position.first);