add a vertical limit for the userslist

set a vertical limit for users after which the scrollbar appears

labs/meteor-client/app/client/stylesheets/chat.less

@@ -28,8 +28,6 @@
   @media @mobile-portrait-with-keyboard, @desktop-portrait, @mobile-portrait {
     -webkit-order: 2;
     order: 2;
-    min-height: 40%;
-    max-height: 40%;
   }
 }
 
@@ -59,13 +57,11 @@
   @media @landscape {
     height: 80%;
   }
-
-  height: 90%;
   overflow-y: scroll;
   padding-left: 0px;
   padding-right: 0px;
   @media @desktop-portrait, @mobile-portrait {
-    max-height: 50vh;
+    max-height: 40vh; // for longer chatbody a scrollbar appears
     overflow-y: scroll;
   }
 }

labs/meteor-client/app/client/stylesheets/style.less

@@ -213,9 +213,8 @@ body {
 }
 
 .ScrollableWindowY {
-  height: 100%;
   overflow-y: scroll;
-  overflow:auto;
+  overflow-y:auto;
 }
 
 .tab {

labs/meteor-client/app/client/stylesheets/users.less

@@ -57,8 +57,6 @@
     order: 3;
     margin-bottom: 0px;
     padding-bottom: 55px; /*so that the footer does not overlap */
-    max-height: 20%;
-    min-height: 20%;
   }
 }
 
@@ -66,12 +64,16 @@
   .userlist {
     @media @landscape { 
       padding:10px;
+      max-height:83vh;
     }
     @media @desktop-portrait {
       padding-top: 10px;
       padding-left: 10px;
       padding-right: 10px;
     }
+    @media @mobile-portrait-with-keyboard, @desktop-portrait, @mobile-portrait {
+      max-height: 40vh; //for longer userlist a scrollbar appears
+    }
   }
 }