Revert "Fix a bug in caching"

This reverts commit 2565df456ecb290f620ce4dadca19c76b0eeb1af.

Conflicts:
	widgets/card.py
Revert "Caching views"

This reverts commit b95a8a443c39ab423ba9f82858cb0427e9cfac69.

Conflicts:
	cache.py
	views/bill.py
	views/main.py
	views/party.py
	views/person.py
	views/region.py
Revert "Caching cards"

This reverts commit c5556efeb23b3ba8ee3b168aad4619530f7c06b0.

Conflicts:
	widgets/card.py