Text override should be used on later added content types

[snoofer]

Describe the bug I've a Columne element with a Questions Set and alot of questions. I've change the default check text after the first element was added. Then I added more elements, but the text override isn't applied to the new elements.

Environment (please complete the following information):

• OS: macOS, Windows
• Lumi Version 0.8.3.0

To Reproduce

• New H5P File
• Select Column
• Add a Title
• Select Questions Set
• Add a questions of type Mark the words
• Go to Text overrides change "Mark the words" text for "Chekc" to something else
• Add another question of type Mark th words
• View

Expected behavior When adding more elements the text override should be applied to them