Allow for panel to be constructed with just width.

It's easy enough to set the position of the panel,
so don't require it.

door.h

@@ -565,6 +565,8 @@ protected:
 
 public:
   Panel(int x, int y, int width);
+  Panel(int width);
+
   // Panel(const Panel &);
   Panel(Panel &) = delete; // default;
   Panel(Panel &&ref);
@@ -633,6 +635,7 @@ public:
   */
 
   Menu(int x, int y, int width);
+  Menu(int width);
   // Menu(const Menu &);
   Menu(const Menu &) = delete;
   Menu(Menu &&);

panel.cpp

@@ -14,6 +14,14 @@ Panel::Panel(int xp, int yp, int panelWidth) : border_color() {
   // border_color = ANSIColor();
 }
 
+Panel::Panel(int panelWidth) : border_color() {
+  x = 0;
+  y = 0;
+  width = panelWidth;
+  hidden = false;
+  border_style = BorderStyle::NONE;
+}
+
 Panel::Panel(Panel &&ref) {
   x = ref.x;
   y = ref.y;
@@ -398,6 +406,13 @@ Menu::Menu(int x, int y, int width) : Panel(x, y, width) {
   chosen = 0;
 }
 
+Menu::Menu(int width) : Panel(width) {
+  setStyle(BorderStyle::DOUBLE);
+  setRender(true, defaultSelectedRender);
+  setRender(false, defaultUnselectedRender);
+  chosen = 0;
+}
+
 /*
 Menu::Menu(const Menu &original)
     : Panel(original.x, original.y, original.width) {