[hotfix] internal-scrolling Modal, margin bottom fix (#126)

* internal-scrolling modal, margin bottom fix

* fix internal-scrolling

Author: kimispencer

src/Lumi/Components/Modal.purs

@@ -481,6 +481,9 @@ styles = jss
                 -- constrain total height while making the intenal content area flexible and scrollable
               , "&[data-variant=\"internal-scrolling\"]":
                   { maxHeight: "100%"
+                  , "& lumi-modal":
+                      { height: "100%"
+                      }
                   , "& lumi-modal lumi-modal-content":
                       { flex: "1 1 auto"
                       , overflowY: "auto"