Confirmation dialog before approving, finishing or publishing a contest

[dmint789]

Right now it's possible to approve, finish or publish a contest by accident, because it only takes one click. There should be a confirmation dialog for each of these.

It should say the following for approving: "Are you sure you want to approve [contest.name]? This will make the contest publicly visible on the contests page.", the following for finishing: "Are you sure you want to finish [contest.name]? This will let the admins know that the contest is ready to be published, and you will no longer be able to edit it or enter results.", and the following for publishing: "Are you sure you want to publish [contest.name]? This will make the results enter the rankings and will approve all new competitors."

Search for confirm( in the entire codebase (Ctrl+Shift+F in VS Code) to see other examples of confirmation dialogs.