Bug: Fix issue #1292

[BPowell76]

Fixed issue https://github.com/requarks/wiki/issues/1292 with new page creation being incorrectly caught in Regex pattern matching that didn't match a language locale.

The server page helper regex pattern now excludes everything that match a living language as recognized by ISO 639-1. New pages can now be created.

In resolving this issue, the locale Regex pattern matching was removed from the new page modal as it adds the locale to the root of the page path. This made the regex matching redundant.

Closes #1292