[Overlay] Remove max-height and max-width from overlay CSS

Issue nasa#1298

Author: cseale

platform/commonUI/general/res/sass/overlay/_overlay.scss

@@ -55,9 +55,7 @@
         height: 70%;
         width: 50%;
         min-height: 300px;
-        max-height: 800px;
         min-width: 600px;
-        max-width: 1000px;
         z-index: 101;
         > .contents {
             $m: $overlayMargin;
@@ -141,4 +139,4 @@
     $h: 225px;
     min-height: $h;
     height: $h;
-}
+}