All: Removed non-existent "-ms-box-sizing"

-ms-box-sizing has never been used by any version of IE.

(cherry picked from commit debea2d)

Closes gh-6738
Fixes gh-6749

Author: siokoshou

css/structure/jquery.mobile.forms.fieldcontain.css

@@ -48,7 +48,6 @@
 		width: 78%;
 		-webkit-box-sizing: border-box;
 		-moz-box-sizing: border-box;
-		-ms-box-sizing: border-box;
 		box-sizing: border-box;
 	}
 	/* ui-hide-label deprecated in 1.4. TODO: Remove in 1.5 */

css/structure/jquery.mobile.forms.flipswitch.css

@@ -54,7 +54,6 @@
 	border-style: solid;
 	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
-	-ms-box-sizing: border-box;
 	box-sizing: border-box;
 	border-radius: inherit;
 	overflow: visible;
@@ -72,7 +71,6 @@ html .ui-popup .ui-field-contain > label + .ui-flipswitch {
 	width: 5.875em; /* If you override the width for .ui-flipswitch you should repeat the same value here */
 	-webkit-box-sizing: content-box;
 	-moz-box-sizing: content-box;
-	-ms-box-sizing: content-box;
 	box-sizing: content-box;
 }
 .ui-field-contain .ui-flipswitch.ui-flipswitch-active,

css/structure/jquery.mobile.forms.slider.css

@@ -32,7 +32,6 @@ input.ui-slider-input {
 	appearance: none;
 	-webkit-box-sizing: content-box;
 	-moz-box-sizing: content-box;
-	-ms-box-sizing: content-box;
 	box-sizing: content-box;
 }
 .ui-slider-input::-webkit-outer-spin-button,

css/structure/jquery.mobile.forms.textinput.css

@@ -13,7 +13,6 @@ textarea.ui-input-text {
 	width: 100%;
 	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
-	-ms-box-sizing: border-box;
 	box-sizing: border-box;
 	outline: 0;
 }

demos/listview-grid/listview-grid.css

@@ -20,7 +20,6 @@
 	.my-page .ui-listview li > .ui-btn {
 		-webkit-box-sizing: border-box; /* include padding and border in height so we can set it to 100% */
 		-moz-box-sizing: border-box;
-		-ms-box-sizing: border-box;
 		box-sizing: border-box;
 		height: 100%;
 	}