[FRG] Expose a focus handler in the options object about fluentreports HOT 2 CLOSED

Hey, just to double check, which focus handler would you like me to expose? OR would you like all of these to be exposed?

1. The fluentReportsEditor (includes, menu's buttons and sidebar)
2. The fluentReportsReport (The area where you can select or drag/drop elements and headers)
3. Every element/header inside the fluentReportsReport

Option 3 could have the on focus handler tied to the element, visible as a function editor in the sidebar. Either way It would definitely also allow you to set a default handler for all elements before creation passed in the same way you pass in formatterFunctions
While Option 1 and 2 would have their handlers passed in the same way you pass in formatterFunctions

from fluentreports.

For my use, all I care about is the focus event at the very top level, which I believe would be Option 1. The div.fluentReports, which currently has a tabindex on it.

from fluentreports.