[TASK] EXT:scheduler:action icons and sorting

In order to be consistent, add action icons
and sort multi action buttons according to the single action.

Resolves: #81080
Releases: master, 8.7
Change-Id: If987643eaea17ed98722b933fc8c57818e7a7a93
Reviewed-on: https://review.typo3.org/52661


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Tested-by: Sascha Egerer <sascha@sascha-egerer.de>
Reviewed-by: Henrik Elsner <helsner@dfau.de>
Tested-by: Henrik Elsner <helsner@dfau.de>
Reviewed-by: Elmar Hinz <t3elmar@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>

typo3/sysext/scheduler/Resources/Private/Templates/Backend/SchedulerModule/ListTasks.html

 <f:format.raw>{table}</f:format.raw>
-<button class="btn btn-default" name="go" id="scheduler_executeselected">
-	<f:translate key="label.executeSelected" />
-</button>
 <button class="btn btn-default" name="go_cron" id="scheduler_executeselected">
+	<core:icon identifier="extensions-scheduler-run-task-cron" />
 	<f:translate key="label.cronjobSelected" />
 </button>
+<button class="btn btn-default" name="go" id="scheduler_executeselected">
+	<core:icon identifier="extensions-scheduler-run-task" />
+	<f:translate key="label.executeSelected" />
+</button>
 
 <f:render partial="ServerTime" arguments="{now: now}" />