Finance: show available room for income and expense for each category

[souvikbasu]

This is a
[ ] bug
[x] feature request
[ ] documentation change
[ ] build/deploy enhancement request

Description:

• Add all income/expense of a category and show the balance amount (plan - actual amount) to the right of the category name
• Show in the dark color how much is consumed from the plan and how much is remaining
• Indicate when the actual amount exceeds plan