Android: ask what to connect to on Connections, the same prompt the desktop's empty terminal draws

The phone's Connections screen with nothing open had a box that took an address alone, which left a
saved machine several screens away. It now draws the desktop's prompt over the same view-model state:
"connect to:" takes a saved host's name or user@host[:port], and a password line follows only when
one is needed. Names, addresses and refusals are read exactly as on the desktop, and nothing typed
here is saved.

What a phone changes: the hosts matching so far are thumb-sized buttons that take a host outright,
since there is no Tab; CONNECT is always drawn, since the IME's return key may only close the
keyboard; BACK, and the system back gesture, step off the password line rather than leaving the
screen; and the password's label sits on its own line. The keyboard follows the question onto the
password line, but is not raised when the screen opens, where it would cover the recent list.

Recent rows now go onto the prompt too. Covered by a new ShellFlowTests case for a tapped match on
top of the shared prompt cases; manual check 11.14.

src/DodoSSH.Client.Android/Theme/Phone.axaml

@@ -843,6 +843,30 @@
     <Setter Property="TextInputOptions.ContentType" Value="Password" />
   </Style>
 
+  <!--
+    The Connections prompt's two lines, typed into the way a shell is: no fill and no border in any state, so
+    the text sits on the pane where its label leaves off and the caret is the only sign the line takes input.
+    44 tall all the same, which is this head's touch floor — the line has no box to aim at, so the whole
+    height of it has to be the target. See ConnectPrompt.axaml. Declared after .secret, which it combines with
+    on the password line and sets nothing in common with.
+  -->
+  <Style Selector="TextBox.prompt">
+    <Setter Property="MinHeight" Value="44" />
+    <Setter Property="Padding" Value="0" />
+    <Setter Property="VerticalContentAlignment" Value="Center" />
+    <Setter Property="Foreground" Value="{StaticResource Text}" />
+    <Setter Property="CaretBrush" Value="{StaticResource AccentText}" />
+    <Setter Property="FontFamily" Value="{StaticResource MonoFont}" />
+    <Setter Property="FontSize" Value="14" />
+  </Style>
+  <Style Selector="TextBox.prompt /template/ Border#PART_BorderElement,
+                   TextBox.prompt:pointerover /template/ Border#PART_BorderElement,
+                   TextBox.prompt:focus /template/ Border#PART_BorderElement">
+    <Setter Property="Background" Value="Transparent" />
+    <Setter Property="BorderBrush" Value="Transparent" />
+    <Setter Property="BorderThickness" Value="0" />
+  </Style>
+
   <!--
     The live dot, and the class name is the same one the desktop sidebar uses so the two heads cannot
     drift on what green means: a terminal is open on this host right now. Deliberately not reachability —