[#71702552] Moderator gets delete button all event

Add a moderator mode and username setter for event card views.
Use the moderator mode and user lookups for the event card template.
[#71702552] Add delete confirm widget

On first delete click trigger delete warning.
Reset button to original delete button after 5000msec wait.
Add styles to make new delete button look right.
Merge branch 'master' into moderator_delete_event
[#70763180] Tweak confirm button styling
Merge pull request #145 from Forekasting/moderator_delete_event

Moderator delete event