Fix Eclipse UI issue (#3549)

* Fix eclipse will auto switch login method when browse auth file

* Fix save and discard button be visiable without change

Author: Flanker32

PluginsAndFeatures/azure-toolkit-for-eclipse/com.microsoft.azuretools.azureexplorer/src/com/microsoft/azuretools/azureexplorer/editors/webapp/WebAppBasePropertyEditor.java

@@ -615,6 +615,7 @@ private void resetTblAppSettings(Map<String, String> map) {
             item.setText(new String[]{key, map.get(key)});
         }
         updateTableActionBtnStatus(true);
+        updateSaveAndDiscardBtnStatus();
     }
 
     private void readTblAppSettings() {

PluginsAndFeatures/azure-toolkit-for-eclipse/com.microsoft.azuretools.core/src/com/microsoft/azuretools/core/ui/SignInDialog.java

@@ -143,7 +143,10 @@ protected Control createDialogArea(Composite parent) {
         rbtnDevice.addSelectionListener(new SelectionAdapter() {
             @Override
             public void widgetSelected(SelectionEvent e) {
-                enableAutomatedAuthControls(false);
+                if(rbtnDevice.getSelection()) {
+                    rbtnDevice.setFocus();
+                    enableAutomatedAuthControls(false);
+                }
             }
         });
         rbtnDevice.setText("Device Login");
@@ -165,7 +168,12 @@ public void widgetSelected(SelectionEvent e) {
         rbtnAutomated.addSelectionListener(new SelectionAdapter() {
             @Override
             public void widgetSelected(SelectionEvent e) {
-                enableAutomatedAuthControls(true);
+                if (rbtnAutomated.getSelection()) {
+                    // Set the radio button to be focused or the default one will be selected when refresh
+                    // For issue https://github.com/microsoft/azure-tools-for-java/issues/3543
+                    rbtnAutomated.setFocus();
+                    enableAutomatedAuthControls(true);
+                }
             }
         });
         rbtnAutomated.setText("Service Principal");