Auto-Assign budget values (Quick Actions)

[Xiphe]

As suggested by @jeifour it would be helpful when:

• Budget (or remove) money to/from a category so that its remaining funds become zero
• Budget (or remove) money to/from a category so that the global money "to budget" becomes zero
• Budget the same amount to a category as the month before
• Budget as much to a category as was spent in it the month before

[leo-benz]

Adding to the suggestions mentioned in this issue the following quick actions would be very useful:

• Same as first point but instead of setting the category to 0 set it to a user-defined value (e.g. keep always 200€ in grocery budget)
• Add a goal (e.g. 1.200€ in December) and budget to the category based on the goal equally distributed to the remaining months

[Xiphe]

I like it! thanks for the feedback