Update bootstrap templates to be more restyle-able 

Right now the bootstrap templates end up looking clunky and they have no identifiable classes so are impossible to restyle. This set of changes removes the `col-` classes and adds targetable classes .ui-select-placeholder .ui-select-match-text and .ui-select-clear. It moves the caret and clear buttons into the the main toggle and allows the main toggle button to be disabled (which was a aesthetics more than functionality)