Tries to fix cursor placement problem in chat write area reported by Emil Ivov.

css/chat.css

     box-shadow: none;
     border-radius:0;
     font-size: 10pt;
-    line-height: 25px;
+    line-height: 30px;
     overflow: hidden;
     resize: none;
 }

index.html

     <link rel="stylesheet" href="css/popover.css?v=2">
       <link rel="stylesheet" href="css/jitsi_popover.css?v=2">
     <link rel="stylesheet" href="css/contact_list.css?v=3">
-    <link rel="stylesheet" href="css/chat.css?v=3">
+    <link rel="stylesheet" href="css/chat.css?v=4">
     <link rel="stylesheet" href="css/welcome_page.css?v=2">
     <!--
         Link used for inline installation of chrome desktop streaming extension,