Display number of pending changes in Firewall

[kchudy]

• Display number of pending changes in Firewall
• Display yellow [!] icon in the pending tab if there are pending changes
• Display toast message informing that the change was added to pending changes

[Va1ter]

i initially added several elements which should help users to navigate between states in this section, not quite sure what was implemented but here is the link to the page https://www.figma.com/design/dZgIk8Ph3EXT0pGfH51MAW/Core?node-id=1772-33263&t=cOFg0Ljz36sQzQpa-11 @kchudy