fixed problems related to timeline and content height's in mozilla

src/component/PopinFixed/PopinFixed.styl

     height calc(100% - 209px)
     &__left
       width 55%
+      height calc(100% - 20px) // 20px => margin of timeline
     &__right
       width 45%
+      height calc(100% - 10px) // 10px => margin of timeline
 
 @media (min-width: min-sm) and (max-width: max-lg)
 

src/component/Timeline/Timeline.styl

   flex-direction column
   margin 10px 10px 10px 5px
   border-radius 10px
-  height calc(100% - 10px) // 10px => margin
+  height 100%
   &__header
     flex 0 1 auto
     border-radius 10px 10px 0 0
     padding-left 0
     border-bottom 1px solid grey
     background-color off-white
-    overflow-Y auto
+    overflow-y auto
     list-style none
     &__item
       padding 0 25px 0 35px