Be consistent with the various `used` columns

[yhylord]

In the change_vote_table migration:

$table->integer('show_result')->default(1); // 1 show 2 no

This doesn't make much sense. Why not 0 no 1 show? That's how integers work as booleans, and it's like this in previous migrations.

[NeverBehave]

😯 That's my bad. Hold on.

[Johnny-Schultz]

38 fixed