In PHP it is common to use names like "Zend_Controller_Front" where the "_" can be thought of as a package.
Currently the camel case filtering for "Goto Type" doesn't work with names following this format.

For example, looking for the class "Zend_Form" using "ZF" als filter will show all types that start with a "Z" and
contain an additional "F" anywhere in the name. This can be reflected through a regular expression like the following:
/Z.*F.*/

As a result, the code navigator will show classes such as "Zend_Auth_Adapter_Http_Resolver_File", rendering it pretty
useless (the filter rule is way to fuzzy).

I'd like to propose to handle "_" as a simple lowercase letter and changing camel case to only allow lowercase letters
(including the underscore) between two uppercase characters.
So the regex for "ZF" would be like this: /Z[a-z_]*F.*/