Increase dialog min width

src/sass/components/_dialogs.scss

@@ -1,6 +1,6 @@
 md-dialog {
-    min-width: 470px;
-    max-width: 600px;
+    min-width: 520px;
+    max-width: 750px;
     p {
         margin-bottom: 16px;
         line-height: 1.3em;