loadEdit duplicates content instead of replacing existing template

[ferozhussain]

Description:

When using the loadEdit() method, the function appends the new template's content to the existing content instead of replacing it. This causes clip duplication and unexpected behavior.

Steps to reproduce:

1. Create an Edit instance and load an initial template
2. Call loadEdit() with a new template
3. Observe that the new template's tracks/clips are added on top of the existing ones, rather than replacing them

[dazzatronus]

Thanks for letting us know. This has been resolved in v1.1.1.