feat: clear out custom base node (#6746)

Description
---
Cleared out the old custom base node in the console wallet base node
list in the network tab if another one is assigned.

**Note:** Currently in the console wallet we only accept one custom base
node, not a list. The new custom base node was added correctly and the
old one removed from the database, the only issue here was that the
Network tab display was not updated.

Fixes #5353

Motivation and Context
---
The old custom base node was not cleared from the list.

How Has This Been Tested?
---
System-level testing

What process can a PR reviewer use to test or verify this change?
---
Code review

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Breaking Changes
---

- [x] None
- [ ] Requires data directory on base node to be deleted
- [ ] Requires hard fork
- [ ] Other - Please specify

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Co-authored-by: SW van Heerden <[email protected]>

applications/minotari_console_wallet/src/ui/state/app_state.rs

@@ -1056,6 +1056,14 @@ impl AppStateInner {
         self.data.base_node_previous = self.data.base_node_selected.clone();
         self.data.base_node_selected = peer.clone();
         self.data.base_node_peer_custom = Some(peer.clone());
+        if let Some(pos) = self
+            .data
+            .base_node_list
+            .iter()
+            .position(|(s, _)| s == "Custom Base Node")
+        {
+            self.data.base_node_list.remove(pos);
+        }
         self.data
             .base_node_list
             .insert(0, ("Custom Base Node".to_string(), peer.clone()));