OO-1970 fix overlapping visiting card logos

src/main/java/org/olat/user/_content/homepagedisplay.html

 <div class="o_visitingcard clearfix well"><div class="o_scrollblock">
-	<h2><i class="o_icon o_icon_visitingcard"></i> $r.translate("menu.homepage") $userFullname</h2>
+	<h2><i class="o_icon o_icon_visitingcard"> </i>$r.translate("menu.homepage") $userFullname</h2>
 	#if ($deleted) 
 		<p class="o_warning">$r.translate("user.deleted")</p>
 	#end

src/main/webapp/static/themes/light/modules/_icons.scss

@@ -243,7 +243,7 @@ $fa-css-prefix: "o_icon" !default;
 .o_icon_upload:before { content: $fa-var-upload; }
 .o_icon_version:before { content: $fa-var-history;}
 .o_icon_video:before { content: $fa-var-film; }
-.o_icon_waiting:before { content: $fa-var-clock-o; }
+.o_icon_visitingcard.o_icon_waiting:before { content: $fa-var-clock-o; }
 .o_icon_warn:before { content: $fa-var-exclamation-triangle; color: $brand-warning;}
 .o_icon_wizard:before { content: $fa-var-magic; }
 .o_icon_xing:before { content: $fa-var-xing; color: #cfdc00;}

src/main/webapp/static/themes/light/modules/_members.scss

@@ -22,6 +22,11 @@
 	right: 0px;
 }
 
+/* hide visiting card logo, no icon found yet */
+.o_visitingcard .o_icon_visitingcard {
+	display: none;
+}
+
 .o_visitingcard .o_portrait_avatar,
 .o_visitingcard .o_portrait_dummy,
 .o_visitingcard .o_portrait_dummy_female_big,
@@ -42,4 +47,17 @@
 	.o_bcard_title_with_logo {
 		padding-right: 70px;
 	}
-}
+}
\ No newline at end of file
+
+/* iphone 6 */
+@media (max-width: 414px) { 
+	.o_visitingcard_logo img { max-width:260px; }
+}	
+/* iphone 6 */
+@media (max-width: 375px) { 
+	.o_visitingcard_logo img { max-width:220px; }
+}	
+/* iphone 4/5 */
+@media (max-width: 320px) { 
+	.o_visitingcard_logo img { max-width:180px; }
+}