LT-250: Creating drawer for toolbar 'more' button

OHIFViewer/client/components/viewer/viewer.styl

@@ -1,8 +1,10 @@
 #viewer
-  width: 100%
-  height: 100%
   border-top: 1px solid #525252
-  
+  display: flex
+  flex-flow: row nowrap
+  height: 100%
+  width: 100%
+
 .noselect
   -webkit-touch-callout: none
   -webkit-user-select: none
@@ -10,10 +12,10 @@
   -moz-user-select: none
   -ms-user-select: none
   user-select: none
-  
+
 .studyBrowser
   width: auto
-  
+
 .viewerMain
   float: left
   background-color: gray
@@ -34,4 +36,4 @@
   width: 120px
   overflow: hidden
   background-color: #000
-  padding-top: 10px
+  padding-top: 10px