Add altRedirectFocus option

If set to true (default), the altField will redirect focus to the main
field (this is how it always worked before this change). Otherwise, the
altField will not redirect its focus, and the altField will behave as a
normal text field that can be edited by the user.

src/docs/options.html

@@ -68,6 +68,9 @@ <h3>Alt Field Options</h3>
 
 		<dt>altTimeFormat</dt>
 			<dd><em>Default: (timeFormat option)</em> - The time format to use with the altField.</dd>
+
+		<dt>altRedirectFocus</dt>
+			<dd><em>Default: true</em> - Whether to immediately focus the main field whenever the altField receives focus. Effective at construction time only, changing it later has no effect.</dd>
 	</dl>
 
 	<h3>Timezone Options</h3>

src/jquery-ui-timepicker-addon.js

@@ -99,6 +99,7 @@
 			altTimeFormat: null,
 			altSeparator: null,
 			altTimeSuffix: null,
+			altRedirectFocus: true,
 			pickerTimeFormat: null,
 			pickerTimeSuffix: null,
 			showTimepicker: true,
@@ -271,11 +272,14 @@
 			tp_inst.$input = $input;
 
 			if (tp_inst._defaults.altField) {
-				tp_inst.$altInput = $(tp_inst._defaults.altField).css({
-					cursor: 'pointer'
-				}).focus(function () {
-					$input.trigger("focus");
-				});
+				tp_inst.$altInput = $(tp_inst._defaults.altField);
+				if (tp_inst._defaults.altRedirectFocus === true) {
+					tp_inst.$altInput.css({
+						cursor: 'pointer'
+					}).focus(function () {
+						$input.trigger("focus");
+					});
+				}
 			}
 
 			if (tp_inst._defaults.minDate === 0 || tp_inst._defaults.minDateTime === 0) {