Display improvements for Notebook

[martindusinberre]

1. Date/time stamp for Input
I've just noticed that although we have time stamps for any "Create new note" input in the notebook, we don't actually time-stamp the "My Input" parts of the notebook (e.g. those that are generated by textExercises). This is also true of emails that you write and which are then saved to Notebook: in an ideal world, they would be date/timestamped too.

My input number alignment
When the player has, say, a textExercise which is saved to Notebook, and when that textExercise requires a numbered input (1., 2., 3., etc), the numbers fall outside the piece of white paper displayed in the Notebook.

[interrogator]

Do have a think. And if a user suggests something related in feedback, we can bump the priority up a bit.