Bangle.js2: showPrompt better alignment of text if no title, and add buttonHeight option

Author: gfwilliams

ChangeLog

@@ -35,6 +35,7 @@
             Storage: Ensure compaction removes any files with invalid file types
             Puck.js: v2.2 compatibility
             Graphics: stringMetrics (and so findFont) now doesn't set unrenderableChars for strings with a '\n' character
+            Bangle.js2: showPrompt better alignment of text if no title, and add buttonHeight option
 
      2v25 : ESP32C3: Get analogRead working correctly
             Graphics: Adjust image alignment when rotating images to avoid cropping (fix #2535)

libs/banglejs/jswrap_bangle.c

@@ -6071,7 +6071,7 @@ E.showMessage("Lots of text will wrap automatically",{
     "return" : ["JsVar","A promise that is resolved when 'Ok' is pressed"],
     "ifdef" : "BANGLEJS",
     "typescript" : [
-      "showPrompt<T = boolean>(message: string, options?: { title?: string, buttons?: { [key: string]: T }, image?: string, remove?: () => void }): Promise<T>;",
+      "showPrompt<T = boolean>(message: string, options?: { title?: string, buttons?: { [key: string]: T }, buttonHeight?: number, image?: string, remove?: () => void }): Promise<T>;",
       "showPrompt(): void;"
     ]
 }
@@ -6112,7 +6112,8 @@ The second `options` argument can contain:
   title: "Hello",                       // optional Title
   buttons : {"Ok":true,"Cancel":false}, // optional list of button text & return value
   img: "image_string"                   // optional image string to draw
-  remove: function() { }                // Bangle.js: optional function to be called when the prompt is removed
+  remove: function() { }                // Bangle.js: optional function to be called when the prompt is removed#
+  buttonHeight : 30,                    // Bangle.js2: optional height to force the buttons to be
 }
 ```
 */

libs/js/banglejs/E_showPrompt_Q3.js

@@ -9,14 +9,15 @@
     g.reset().setFontAlign(0,0);
     var R = Bangle.appRect, Y = R.y, W = R.w;
     var title = g.findFont(options.title||"", {w:W-2,wrap:1,max:24});
-    if (title.text)
+    if (title.text) {
       g.setColor(g.theme.fgH).setBgColor(g.theme.bgH).
         clearRect(0,Y,W-1,Y+4+title.h).
         drawString(title.text,W/2,Y+4+title.h/2);
-    Y += title.h+4;
+      Y += title.h+4;
+    } else Y+=4;
     var BX = 0|"0123233"[btns.length],
         BY = Math.ceil(btns.length / BX),
-        BW = (W-1)/BX, BH = (BY>1 || options.img)?40:50;
+        BW = (W-1)/BX, BH = options.buttonHeight || ((BY>1 || options.img)?40:50);
     var H = R.y2-(Y + BY*BH);
     if (options.img) {
       var im = g.imageMetrics(options.img);