Profile comparison should provide profile alignment option

It would be nice to be able to have control over the alignment of the two profiles once they are in the comparison view.

Two options have be suggested:

1. Add some form of manual alignment/sliding to a given profile. So the user could slide one profile left/right
1. Add an "Align on Marker" option which would automatically align the two profiles based on the selected marker (Similar to Florien's comparison scripts)

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-127)