Make non-break space and non-break hyphen available in special chars

[Gauthier Bastien]

The problem

For now, it is difficult to enter non-break space or hyphen in the editor whtout using a specific plugin ou source.

Solution

Do those spechal characters available in the special chars dialog

I am very new to contribute to CKEditor so, if this is accepted, I will propose a PR on the github repository

Thank you!

Gauthier

[Jakub Ś]

The pull request reported: ​https://github.com/ckeditor/ckeditor-dev/pull/216.

This part is for CKEditor team:
Inserting   through special characters is one thing but users were also asking for possibility to insert   whith Shift + Space #5523 (just like in FCKeditor) and ability to encode   as numerical entity but this is rather covered by configuration options for entities e.g. config.entities_processNumerical = 'force';.

[Gauthier Bastien]

Hi j.swiderski, I think many users do not know about keyboard shortcuts so having both methods (specialchar for everybody and shortcuts for advanced users) is a good way to cover differents needs.

The PR is about specialchar, we could do another PR for keyboard shortcuts, including Shift + '-' to insert a non-break hyphen.

Gauthier

[Jakub Ś]

All users are welcome to sumbit PR's anytime. They just need to get familiar with ​http://docs.ckeditor.com/#!/guide/dev_contributing and ​https://help.github.com/articles/creating-a-pull-request.

[Marek Lewandowski]

This feature could be easily achieved with ​specialChars porperty.

See ​https://github.com/ckeditor/ckeditor-dev/pull/216#issuecomment-408911493 for more details.