Avoid multiple calls to isIdleEvent when checking if EMO should be displayed

The result of getEntry is sufficient to determine if an EMO is an idle
event, so use that instead of making an additional call to
isIdleEvent.

Author: rbuch

src/projections/Tools/Timeline/EntryMethodObject.java

@@ -798,13 +798,14 @@ public boolean isUnaccountedTime(){
 
 /** Whether this object is displayed or hidden (for example when idle's are not displayed this might be false) */
 	public boolean isDisplayed() {
+		final int entry = getEntry();
 		// If it is hidden, we may not display it
-		if(data.entryIsHiddenID(getEntry())) {
+		if(data.entryIsHiddenID(entry)) {
 			return false;
 		}
 
 		// If this is an idle time region, we may not display it
-		if (isIdleEvent() && (!data.showIdle() || MainWindow.IGNORE_IDLE)) {
+		if (entry == Analysis.IDLE_ENTRY_POINT && (!data.showIdle() || MainWindow.IGNORE_IDLE)) {
 			return false;
 		}