Update constants for relayout

ee/app/assets/javascripts/roadmap/constants.js

@@ -2,10 +2,14 @@ export const TIMEFRAME_LENGTH = 6;
 
 export const EPIC_DETAILS_CELL_WIDTH = 320;
 
+export const EPIC_ITEM_HEIGHT = 50;
+
 export const TIMELINE_CELL_MIN_WIDTH = 180;
 
+export const SHELL_MIN_WIDTH = 1620;
+
 export const SCROLL_BAR_SIZE = 15;
 
-export const TIMELINE_END_OFFSET_HALF = 17;
+export const TIMELINE_END_OFFSET_HALF = 6;
 
-export const TIMELINE_END_OFFSET_FULL = 26;
+export const TIMELINE_END_OFFSET_FULL = 16;