Prototype new panel concept

Author: Vitaliy Guliy

ide/che-core-ide-app/src/main/java/org/eclipse/che/ide/part/PartStackPresenter.java

@@ -480,15 +480,13 @@ public void restore() {
         State prevState = state;
         state = State.NORMAL;
 
-        if (!parts.isEmpty()) {
-            if (currentSize < MIN_PART_SIZE) {
-                currentSize = DEFAULT_PART_SIZE;
-            }
-
-            workBenchPartController.setSize(currentSize);
-            workBenchPartController.setHidden(false);
+        if (currentSize < MIN_PART_SIZE) {
+            currentSize = DEFAULT_PART_SIZE;
         }
 
+        workBenchPartController.setSize(currentSize);
+        workBenchPartController.setHidden(false);
+
         // Ask the delegate to restore part stacks if this part stack was maximized.
         if (prevState == State.MAXIMIZED) {
             if (delegate != null) {