[ticket/11010] Add HTML5 input types to installer

Add new HTML5 input types to installer

PHPBB3-11010
[ticket/11010] Add all HTML5 input types to ACP

Add all new HTML5 input types to functions_acp.php, handle them as text for now

PHPBB3-11010
[ticket/11010] Change input type to search for search forms

Change input type to search for search forms
Replace search placeholder JS with placeholder attribute
Add style for search placeholder

PHPBB3-11010
Merge pull request #1 from cyberalien/ticket/11010

[ticket/11010] Add HTML5 input types to installer