fixing some last minute bugs

mockup/bs4/css/mockup.css

@@ -179,6 +179,7 @@ body .brand-heading .icon-conversejs {
 #conversejs.fullscreen.login {
   width: calc(100vw - 20px);
   height: calc(100vh - 20px);
+  margin: 10px;
 }
 #conversejs.fullscreen.login #controlbox #login-dialog {
   height: 100%;

mockup/bs4/less/mockup.less

@@ -93,7 +93,7 @@ body {
 	&.fullscreen {
 		width:100%; height:100%; right:0; bottom:0; color:@text-color;
 		&.login {
-			width:calc(~"100vw - 20px"); height:calc(~"100vh - 20px");
+			width:calc(~"100vw - 20px"); height:calc(~"100vh - 20px"); margin:10px;
 			#controlbox #login-dialog {
 				height:100%; border-radius:5px;
 				.brand-heading { font-size:6em; }