Clickover plugin not compatible with bootstrap 3

The [clickover](https://github.com/lecar-red/bootstrapx-clickover) plugin has not been updated in a year and is not compatible with bootstrap 3. (See, e.g. #3424)
I'm seeing some strange behavior when I do this:

```
1. Click a trigger to open a popover
2. Click the trigger again. The popover closes as expected
3. Click the trigger again. Nothing happens, whilst I would expect the popover to show
4. Click the trigger again. The popover now opens
```