timeline & l-cluster updates

Problem

Timeline

Issue with calculation of where to place entries was off in some cases.
No accent color to the popover for entries
Icons can be covered up sometimes with expandable entries

l-cluster

when using right/left-spacing and when viewing on a small screen vertical spacing wouldn't be flush

Solution

Timeline

make sure entries are placed correctly
Add accent colors in entry popovers
Move icons to the left some if they are being covered by a expandable entry

l-cluster

adjust spacing on small screens to keep items in a cluster properly spaced out