Show susi footer on susimail and susidns when displayed standalone

Footer hidden when embedded because of margin issues, and out-of-place-ness.
Have confirmed that susi's opinion when the themes were initially updated was
"do what you want", so no legal problem.

installer/resources/themes/susidns/dark/susidns.css

@@ -133,6 +133,9 @@ p.messages {
 p.footer {
      font-size:7pt;
      text-align: center;
+}
+
+.iframed p.footer {
      display: none;
 }
 

installer/resources/themes/susidns/light/susidns.css

@@ -102,6 +102,9 @@ p.messages {
 p.footer {
      font-size:7pt;
      text-align: center;
+}
+
+.iframed p.footer {
      display: none;
 }
 

installer/resources/themes/susidns/midnight/susidns.css

@@ -133,6 +133,9 @@ p.messages {
 p.footer {
      font-size:7pt;
      text-align: center;
+}
+
+.iframed p.footer {
      display: none;
 }
 

installer/resources/themes/susimail/dark/susimail.css

@@ -76,6 +76,9 @@ p.footer {
      margin-right:10mm;
      font-size:8pt;
      line-height:10pt;
+}
+
+.iframed p.footer {
      display: none;
 }
 

installer/resources/themes/susimail/light/susimail.css

@@ -54,6 +54,9 @@ p.footer {
      margin-right:10mm;
      font-size:8pt;
      line-height:10pt;
+}
+
+.iframed p.footer {
      display: none;
 }