Claim Limit calculators
ClaimLimitCalculator no longer needs `phase` argument
Add claim limits to lender dashboard
Tidy up dashboard CSS
New layout for dashboard, with peity pie charts!
Use inheritance for phase rules.

Each new phase rules object defines what has changed
from the previous phase.
Return correct phase rules object in Loan#rules
Do not show dashboard claim limits to CfeUser
Tweak dashboard colours
Update dashboard request specs
Make loan alerts style more consistent
Add tooltip to dashboard loan alerts
Shiny gradients
Display pre-claim realisations and settled amount on dashboard
Include Type H in phase 6 claim limit calculations