Also fix issue where the last line's dropdown is cut off and creates overflow on the events container. Fixed this by (1) moving the last dropdown up a bit and (2) setting the event container's overflow property as `hidden`
Other Changes:
- Fix horizontal scrollbar if log line exceeds width of page
- Restored style for dropdown button on top of page
- Remove unused CSS properties
I extracted the dropdown portion of the LogActionsToolbar into a separate DropdownMenu component so that it can be reused for Jump to Context.
Other Changes:
- Remove unused style in LogActionsToolbar