Feature/Duplicate expense

[Maxco10]

This pull request adds the "Clone expense" feature to Spliit projects.
The feature can be useful as shortcut for all similar transactions.

EDIT1: The cloned expense will have new Date() as date.

PR.mov

[Maxco10]

Updated PR with latest change on languages

[CarliJoy]

From a user perspective it is not clear what happens with the date? Why should I create a expense with the same date and time?
I would expect that the date is not copied but a new expense with the current date is created.
But than it is not really a clone rather a recreation.
Maybe in the clone dialog it would be nice to change the creation date directly with the option to set it to today?

[Maxco10]

@CarliJoy
Thank you for your feedback.
When I made the feature, I was thiking a clone of expense(all fields) but your point of view, it is correct about date.

[Maxco10]

The cloned expense will have new Date() as date.