The new CSV report was more configurable and could work on proposals,
processes and comments. However, it had several issues.
In the public area, by default it generated a blank file.
In the admin section, the report was hard to configure and it generated
a file with less quality than the old system.
So until we improve this system, we're bringing back the old investment
CSV exporter.
This commit reverts most of commit 9d1ca3bf.
We were very inconsistent regarding these rules.
Personally I prefer no empty lines around blocks, clases, etc... as
recommended by the Ruby style guide [1], and they're the default values
in rubocop, so those are the settings I'm applying.
The exception is the `private` access modifier, since we were leaving
empty lines around it most of the time. That's the default rubocop rule
as well. Personally I don't have a strong preference about this one.
[1] https://rubystyle.guide/#empty-lines-around-bodies
There were some custom routes created using the param[:id] but the
Rails routes use the param[:budget_id] by default, so the same
controller could be asked for different param keys.
Note that we are relying on the existing `sort_by_name`[1] method in the `Budget::Heading` class.
This method sorts by DESC group name first and then ASC heading name.
[1] https://github.com/AyuntamientoMadrid/consul/pull/1875
