Fixed NullReferenceException in WorldBrowserWindow

[Burrik]

Description

Fixed NullReferenceException in WorldBrowserWindow after script recompilation in Play Mode.

Problem

When scripts are recompiled in Play Mode:

1. All fields in WorldBrowserWindow are reset to null
2. Update() continues to be called
3. This causes NullReferenceException when trying to access null fields

Solution

Improved null-checks in Update() method:

1. Added early return if not initialized
2. Added componentsStorage null check
3. Reset initialized flag if componentsStorage is null
4. Removed redundant checks and simplified the code

How to Test

1. Open World Browser window
2. Enter Play Mode
3. Make any script change to trigger recompilation
4. Verify that:
   • No NullReferenceException occurs
   • Window properly reinitializes after recompilation
   • All functionality works correctly

Before Fix

NullReferenceException occurs after script recompilation:
NullReferenceException: Object reference not set to an instance of an object
Scellecs.Morpeh.Utils.Editor.WorldBrowserWindow.Update()

After Fix

• No exceptions after recompilation
• Window gracefully handles null states
• Properly reinitializes when needed