\#dotypeinv ('I') - show title for inventory subset

When asking for an inventory subset for one of the meta-classes that
can generate output which spans object classes (so B,U,C,X, and P),
insert a title at the start of the resulting inventory list.  (Iu and
Ix produce alternate output that already includes a title.)

Also, stop handling '$' differently for menustyles traditional and
combination from full and partial.  'I$' was running the '$' command
for the first two styles but just showing the inventory entry for
gold for the last two.  Change to the latter for all styles.

src/pickup.c

@@ -985,6 +985,12 @@ query_objlist(const char *qstr,        /* query string */
     win = create_nhwindow(NHW_MENU);
     start_menu(win, MENU_BEHAVE_STANDARD);
     any = cg.zeroany;
+    if (g.this_title) {
+        /* dotypeinv() supplies g.this_title to display as initial header;
+           intentionally avoid the menu_headings highlight attribute here */
+        add_menu(win, &nul_glyphinfo, &any, 0, 0, ATR_NONE,
+                 g.this_title, MENU_ITEMFLAGS_NONE);
+    }
     /*
      * Run through the list and add the objects to the menu.  If
      * INVORDER_SORT is set, we'll run through the list once for