Replacement for standard search function in autocomplete

[mauromascarenhas]

Proposed changes

The current implementation of "onSearch" callback considers every option element when filtering, which causes undesired options to be displayed for autocompletion (see attached screenshots).

This PR aims to replace the current standard search function that should consider only the "id" and "text" attributes, if available, when filtering the given options.

Summary:

• Enhancements in standard search function:
  • It now considers only the "id" and "text" attributes;
  • Localized "lowercase" (better internationalization);
  • Standard search still does not takes "text" into consideration if it is not provided;
  • Reduced algorithmic complexity (no longer makes two iterations over the array and does not consider every option entry).
• Docs:
  • Removed references to "old data type";
  • Added descriptions for option "id", "text" and "image" attributes;
  • Replaced sample implementation of standard search function.

Screenshots (if appropriate) or codepen:

Current behaviour

It displays "google" as a option, even though the word does not have an "a" on its spelling (it is possible to reproduce it in the current version of the docs 😞).

Autocomplete with new "standard search" implementation

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to change).

Checklist:

• I have read the CONTRIBUTING document.
• My commit messages follows the conventional commit format
• My change requires a change to the documentation, and updated it accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.