Refactor minor leftover of Total part
Round computing results for table to 3 digits

Higher precision does not make sense anyway and this allow for easier comparaison
Delete all previous test logs to avoid confusion
Filter can appear more than once in /browse/table

This is typically the case with high filters where 'total improved'
and 'pipes onto premises' would both have 'house connections' as a
child. This filter tree structure is correct and must be supported.
Minor typo in unique constraint
Imported answers were wrongly overwritten

If filters had duplicated names, then answers for those filters would
be overwritten instead of creating a new answer
Question were not properly re-sorted anymore
Refactor boolean properties with prefix 'is'
BREAKING CHANGE: compact all DB migrations for first production version