Revert the settings row wrap that broke every long description

5423301 gave `settings_row` `flex_wrap()` and swapped the label column's
`min_w_0` for `flex_1` + a 200px floor, so the SSH host form would stack
instead of overflowing in a narrow pane. On every other settings page that
stopped long descriptions wrapping at all: the text ran under its own
control and out past the row it belongs to, which is plainly worse than
the case it was meant to fix.

The row goes back to what it was. `#ssh-detail` keeps its `min_w_0` — that
half of the commit is what actually fixed the 1200px overflow, and it is
independent of the row.

The SSH form still degrades below roughly 1000px, where the label column
squeezes to a word per line. That is the real remaining bug and it needs a
different answer than wrapping this row.

src/ui/settings.rs

@@ -1063,15 +1063,9 @@ impl Tty7App {
         };
         h_flex()
             .id(element_id)
-            // A settings pane can end up narrow — the SSH page spends 500px on
-            // its two lists before this row gets any. Wrapping puts the control
-            // on its own line rather than pushing it off the right edge, and the
-            // floor below stops the label shrinking into one word per line.
-            .flex_wrap()
             .items_center()
             .justify_between()
-            .gap_x_8()
-            .gap_y_2()
+            .gap_8()
             .py_2()
             .px_2p5()
             .mx_neg_2p5()
@@ -1083,8 +1077,7 @@ impl Tty7App {
             .child(
                 v_flex()
                     .gap_0p5()
-                    .flex_1()
-                    .min_w(px(200.))
+                    .min_w_0()
                     .child(
                         div()
                             .text_sm()