[make:entity] Prevent entity name from having an accent

[Fan2Shrek]

Fixes #1379

Entity name cannot longer have accent :)

[jrushlow]

Thank you @Fan2Shrek

[vsyrovat]

Bad MR. I had to downgrade to 1.56 because of it.

Firstly, the error message is inaccurate. The ASCII character set contains more than just A-Z range, see ascii-code dot com for details. So correct message for current regexp should be "Only a-zA-Z allowed" not "ASCII". (Actually, the result error message should not be this, I describe this point later).

Secondly, why only A-Z? Where is the digits? I want to make the OAuth2ClientProfile but with maker bundle 1.57 I cannot do this anymore. The maker bundle is broken now.

Thirdly, in the description of the issue exists phrase: "It would probably be wise to filter input and refuse problematic characters in class/entity names." Not "refuse all characters except of good" but "refuse problematic". In meaning, this is closer to a blacklist than a whitelist. Creating of a whitelist requires found ALL of the non-problematic characters before adding em to the whitelist. It means more attention and accuracy than blacklist.

Fourthly, this MR changes behavior of maker bundle significantly. Denying a programmer to use some character is bold, unreasonably bold. It is better to notify the programmer about problematic characters presented in typed entity name and let him decide whether to leave them. "The entity name you entered has some non-ASCII characters which are potentially problematic with SQLite. It is recommended to use only ASCII characters in entity names. Would you keep entered name? [no]".

So, I consider 1.57.0 is broken and see two possible solutions:

• fast: add digits and underscore to the regexp,
• full: use recommendations instead of prohibitions.