ROU-4386: ContextMenu - avoid raising twice ToggleEvent when opening

[rugoncalves]

When the context menu event is opening.

This PR is for fixing the behavior in which the ContextMenu was raising the event of Toggle twice, when the ContextMenu was being open.

What was happening

• The context menu was raising twice the toggle event when it was opening

What was done

• Protected the place where the event was being inadvertently raised
• The event in this place, will now only be raised when the ContextMenu is closing

Test Steps

1. Right click on any column - context menu opens, and the message of it opening should finish with (1) in the end
2. Repeat the operation to another column - the message should end with (2)
3. Repeat 2. - the message should end with (3)

Checklist

• tested locally
• documented the code
• clean all warnings and errors of eslint
• requires changes in OutSystems (if so, provide a module with changes)
• requires new sample page in OutSystems (if so, provide a module with changes)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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