WIP: add options hideScoreBeforeSubmit, showSolutionsAfterSubmit

[kwibus]

My goal is that you only can view you score after you have submitted your answers.
see also #133

I have made a options hideScoreBeforeSubmit that enables this.

Also add option showSolutionsAfterSubmit that will make interactive book will show Solutions of all question after submit answers.

TODO

• clean up
• I don't like how score in written now after submit. now is:
  - chapter is redrawn.
  - then .h5p-interactive-book-summary-buttons is found and styled/focused
• save and restore that you have submitted you answers

[otacke]

@kwibus You will at least need to:

• update the translation files to reflect the new structure of semantics.json, otherwise the editor may break in other languages than English.
• adhere to the H5P coding style: for instance there should not be a space between a negating ! and the following expression, one should not use != but !==, use singe quotes for strings (not double quotes and not ` unless you're using a template literal, etc.
• remove TODOs or implement them.
• use const instead of let when a variable is not going to change (wrapper).
• proof-read your translatable strings in semantics.json
• add the new translatable strings to the sanitizeConfig function.

maybe you'd also want to ...

• not use query selectors, but use variables instead - in particular if the wrapper variable is available (and automatically remove potentially confusing re-use of the same variable name in nested variable scopes) - yes, that may require rewriting something else, but you have a "TODO" attached to that part anyway.
• ensure that the "don't show score" state is reset as well when the user resets the exercise.
• wait for someone of the H5P core team to confirm that this feature is desired, otherwise you may waste your time (except for having some coding exercise).

[kwibus]

Thanks for you fast feedback,

I think wont be hard to fix those issues.
Als I think you right in that it might be better to wait until someone of the H5P Core team confirms this is a desired feature. So I will wait on that.