iris: separate layout allocation from lengths

app/src/ui/composer.rs

@@ -33,7 +33,7 @@ impl Composer {
     /// so the field's focus, selection and in-progress text are untouched.
     pub fn set_bottom_inset(&self, rsc: &mut impl UiRsc, inset: f32) {
         if let Some(pad) = rsc.ui_mut().widgets.get_mut(&self.outer_pad) {
-            pad.padding.bottom = Len::abs(inset);
+            pad.padding.bottom = LayoutLen::abs(inset);
             pad.exact_region = true;
         }
     }

app/src/ui/row.rs

@@ -240,7 +240,7 @@ where
         BlockFrame::Quote => field
             .width(rest(1))
             .pad(Padding {
-                left: dp(QUOTE_BAR_DP + FRAME_PAD_DP),
+                left: dp(QUOTE_BAR_DP + FRAME_PAD_DP).into(),
                 ..Padding::ZERO
             })
             .background(rect(theme.quote_bar.clone()).width(dp(QUOTE_BAR_DP)))