Revert "Skip replacing meta/viewport"

This reverts commit 6c460eef23.

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

@@ -2481,17 +2481,15 @@ public class HtmlHelper {
         // https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag
         // https://drafts.csswg.org/css-device-adapt/#viewport-meta
         Elements meta = document.select("meta").select("[name=viewport]");
-        if (meta.size() != 1)
-            return;
-
         // Note that the browser will recognize meta elements in the body too
         if (overview) {
             // fit width
-            //meta.remove();
+            meta.remove();
-            //document.head().prependElement("meta")
+            document.head().prependElement("meta")
-            //        .attr("name", "viewport")
+                    .attr("name", "viewport")
-            //        .attr("content", "width=device-width");
+                    .attr("content", "width=device-width");
         } else {
+            if (meta.size() == 1) {
                 String content = meta.attr("content");
                 String[] param = content.split("[;,]");
                 for (int i = 0; i < param.length; i++) {
@@ -2514,6 +2512,12 @@ public class HtmlHelper {
                     }
                 }
                 meta.attr("content", TextUtils.join(",", param));
+            } else {
+                meta.remove();
+                document.head().prependElement("meta")
+                        .attr("name", "viewport")
+                        .attr("content", "width=device-width, initial-scale=1.0");
+            }
         }
 
         if (BuildConfig.DEBUG)