Description:
The dialog makes no sense, see below.

Steps to Reproduce:
1. Apply conditional formatting to a region / cells ranges in a table.
2. Later, right-click in one of the cells and choose "Conditional formatting".

Actual Results:
Result: a dialog pops up, with "No" and "Yes" action buttons:

> "The selected cell already contains conditional formatting. You can either edit the existing conditional format or you define a new overlapping conditional format. Do you want to edit the existing conditional format?"

...however, the result of the "No" and "Yes" buttons make no sense. See below.

Expected Results:
* Clicking "No" currently does nothing, it just cancels your action, as far as I can tell. If so, then it should be labelled "Cancel".
* The "Yes" button does not open the "Manage conditional formatting" dialog as I would have expected it to, it opens a new blank conditional format for that specific selected cell. It's the opposite from what I expected when reading the dialog, and it fact it *directly contradicts* the 2nd sentence of that dialog. That button should be labelled "Add overlapping conditional format" or "Add new format".
* There needs to be a new (third) button labelled "Manage existing format", because that's what I actually want to do, especially after reading the dialog's text contents.


Reproducible: Always


User Profile Reset: No



Additional Info:
I like turtles.