[WIP][RFC] add events back into core that were removed. refs #1792

I added the events back that were removed except for the one that was never implemented in the first place. This is strictly for BC. 

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| Refs tickets  | #1792
| License       | MIT
| Doc PR        | -
Probably don't remove these lines but add a line "these events are deprecated and will be removed as of core xyz".