fix: separate None from available keys in identity pickers

Frameworks/TermindPresentation/IdentityFormSections.swift

@@ -82,6 +82,9 @@ public struct IdentityFormSections: View {
             if showsKey {
                 Picker(AppStrings.Vault.key.swiftUIKey, selection: $keyID) {
                     Text(AppStrings.Common.none).tag(SSHKeyRef.ID?.none)
+                    if !keys.isEmpty {
+                        Divider()
+                    }
                     ForEach(keys) { key in
                         Text(key.label).tag(SSHKeyRef.ID?.some(key.id))
                     }

TFI/Features/HostEditor/MobileHostEditor.swift

@@ -134,6 +134,9 @@ struct MobileHostEditor: View {
                                 }
                                 Picker(AppStrings.Vault.key.swiftUIKey, selection: $customIdentity.sshKeyID) {
                                     Text(AppStrings.Common.none).tag(SSHKeyRef.ID?.none)
+                                    if !library.keys.isEmpty {
+                                        Divider()
+                                    }
                                     ForEach(library.keys) { key in Text(key.label).tag(SSHKeyRef.ID?.some(key.id)) }
                                 }
                             }

TFM/Features/HostEditor/HostEditorView.swift

@@ -246,6 +246,9 @@ struct HostEditorView: View {
                             .disabled(!customIdentity.sshPasswordIsEditable)
                             Picker(AppStrings.Vault.key.swiftUIKey, selection: $customIdentity.sshKeyID) {
                                 Text(AppStrings.Common.none).tag(SSHKeyRef.ID?.none)
+                                if !app.hostLibrary.keys.isEmpty {
+                                    Divider()
+                                }
                                 ForEach(app.hostLibrary.keys) { key in
                                     Text(key.label).tag(SSHKeyRef.ID?.some(key.id))
                                 }