searchbar: fix jslint errors

searchbar: fix jslint errors

'toggleClear' was used before it was defined.
toggleClear(); // Line 145, Pos 13
'makeFrontIcon' was used before it was defined.
makeFrontIcon(); // Line 154, Pos 17
'hideCancel' was used before it was defined.
hideCancel(); // Line 172, Pos 29
'showCancel' was used before it was defined.
showCancel(); // Line 190, Pos 25
'toggleClear' was used before it was defined.
function toggleClear() { // Line 242, Pos 22
Expected 'cancelbtn' at column 17, not column 21.
cancelbtn // Line 252, Pos 21
Expected 'cancelbtn' at column 17, not column 21.
cancelbtn // Line 261, Pos 21
'makeFrontIcon' was used before it was defined.
function makeFrontIcon() { // Line 267, Pos 22
Expected ';' and instead saw '$'.
this.element.parent().parent().find(".ui-input-cancel").removeClass( "ui-disabled" ) // Line 292, Pos 97

Change-Id: Ia4dcae9bb0b267da5fba108d28d4b56a6bb8c436