alerting: fixed width of query component in alert tab

public/app/features/alerting/partials/alert_tab.html

@@ -47,7 +47,7 @@
             <span class="gf-form-label query-keyword">OF</span>
 					</div>
 					<div class="gf-form">
-						<query-part-editor class="gf-form-label query-part width-10" part="conditionModel.queryPart" handle-event="ctrl.handleQueryPartEvent(conditionModel, $event)">
+						<query-part-editor class="gf-form-label query-part" part="conditionModel.queryPart" handle-event="ctrl.handleQueryPartEvent(conditionModel, $event)">
 						</query-part-editor>
 					</div>
 					<div class="gf-form">