Provide option to select a sub-set of special characters

[ou-li]

Hi!
Thank you for the excellent plugin. Thanks to its neat structure, it was really easy to adapt it to my own needs.
Having to deal with French language professionally, I have added some more characters and removed the ones that I do not need by simply adapting advancedletters.html:
...
<div id="letters"> <input type="button" class="letter" value="à"/> <input type="button" class="letter" value="â"/> <input type="button" class="letter" value="æ"/> <br/> <input type="button" class="letter" value="ç"/> <br/> <input type="button" class="letter" value="é"/> <input type="button" class="letter" value="è"/> <input type="button" class="letter" value="ê"/> <input type="button" class="letter" value="ë"/> <br/> <input type="button" class="letter" value="ï"/> <input type="button" class="letter" value="î"/> <br/> <input type="button" class="letter" value="ô"/> <input type="button" class="letter" value="œ"/> <br/> <input type="button" class="letter" value="ù"/> <input type="button" class="letter" value="û"/> <input type="button" class="letter" value="ü"/> <br/> <input type="button" class="letter" value="ÿ"/> <br> <input type="button" class="letter" value="€"/> <br> <input type="button" class="letter" value="«"/> <input type="button" class="letter" value="»"/> </div>
...
This would be very useful to my students, so I would like make it available via Mozilla's addon repository.

Would you consider adding an option to select specific character sets?
Regards,
uo-li

[Sav22999]

@ou-li thank you for your interest.

Sure, I can add the choosing of sets, but I cannot promise you to add this in this week... I need at least some weeks, because I'm a bit busy.

I hope you can wait some time, otherwise you can share your code with your students 😉

[ou-li]

Thanks for your feedback!
I'll see what will be the most efficient option.

If my skills and time are sufficient 🙃, I will send you a pull request.