fix: make server icon customization available on all pages

- Moved icon modal properties and methods from Overview.php to base Component.php
- All Proxmox Livewire components now inherit icon customization functionality
- Removed view restriction so modal works on all server pages (not just overview)
- Icon button is now clickable and functional on Network, Storage, Backups, etc.

extensions/Servers/Proxmox/views/components/layout.blade.php

@@ -920,7 +920,6 @@
         </div>
 
         <!-- Server Icon Customization Modal -->
-        @if($view === 'overview')
         <div x-data="{ 
             open: @entangle('showIconModal'),
             selectedIcon: @entangle('selectedIcon'),
@@ -1068,7 +1067,6 @@
                 </div>
             </div>
         </div>
-        @endif
 
     @else
         @php