Update RPIT lifetime bounds for the 2024 edition

When the bound matches the implicit bound, i.e. when you'd just write

    impl ... + use<'_>

then it can be omitted. My gut instinct is to always write the bound
explicitly, but maybe that'll harm readability once I'm more used to how
bounds work now.

Anyways, always try to keep the bound as small as possible, ideally just

    impl ... + use<>

cove/src/ui/euph/account.rs

@@ -35,7 +35,7 @@ impl LoggedOut {
         }
     }
 
-    fn widget(&mut self) -> impl Widget<UiError> + '_ {
+    fn widget(&mut self) -> impl Widget<UiError> {
         let bold = Style::new().bold();
         Join4::vertical(
             Text::new(("Not logged in", bold.yellow())).segment(),
@@ -111,7 +111,7 @@ impl AccountUiState {
         }
     }
 
-    pub fn widget(&mut self) -> impl Widget<UiError> + '_ {
+    pub fn widget(&mut self) -> impl Widget<UiError> {
         let inner = match self {
             Self::LoggedOut(logged_out) => logged_out.widget().first2(),
             Self::LoggedIn(logged_in) => logged_in.widget().second2(),

cove/src/ui/euph/auth.rs

@@ -13,7 +13,7 @@ pub fn new() -> EditorState {
     EditorState::new()
 }
 
-pub fn widget(editor: &mut EditorState) -> impl Widget<UiError> + '_ {
+pub fn widget(editor: &mut EditorState) -> impl Widget<UiError> {
     Popup::new(
         editor.widget().with_hidden_default_placeholder(),
         "Enter password",

cove/src/ui/euph/links.rs

@@ -38,7 +38,7 @@ impl LinksState {
         }
     }
 
-    pub fn widget(&mut self) -> impl Widget<UiError> + '_ {
+    pub fn widget(&mut self) -> impl Widget<UiError> {
         let style_selected = Style::new().black().on_white();
 
         let mut list_builder = ListBuilder::new();

cove/src/ui/euph/nick.rs

@@ -14,7 +14,7 @@ pub fn new(joined: Joined) -> EditorState {
     EditorState::with_initial_text(joined.session.name)
 }
 
-pub fn widget(editor: &mut EditorState) -> impl Widget<UiError> + '_ {
+pub fn widget(editor: &mut EditorState) -> impl Widget<UiError> {
     let inner = editor
         .widget()
         .with_highlight(|s| euph::style_nick_exact(s, Style::new()));

cove/src/ui/rooms/connect.rs

@@ -84,7 +84,7 @@ impl ConnectState {
         ConnectResult::Unhandled
     }
 
-    pub fn widget(&mut self) -> impl Widget<UiError> + '_ {
+    pub fn widget(&mut self) -> impl Widget<UiError> {
         let room_style = Style::new().bold().blue();
         let domain_style = Style::new().grey();
 

cove/src/ui/rooms/delete.rs

@@ -47,7 +47,7 @@ impl DeleteState {
         DeleteResult::Unhandled
     }
 
-    pub fn widget(&mut self) -> impl Widget<UiError> + '_ {
+    pub fn widget(&mut self) -> impl Widget<UiError> {
         let warn_style = Style::new().bold().red();
         let room_style = Style::new().bold().blue();
         let text = Styled::new_plain("Are you sure you want to delete ")