[OSK] On Screen Keyboard overhaul

Primary changes:
Convert from dialog to an ordinary window, placing buttons according to data in keyboard.c
Character button text is now according to selected keyboard layout instead of system language.
Buttons will update* automatically when there is a layout switch (and when shift/capslock are pressed).
(Updating is most reliable when the keyboard is focused)
Removed keyboard dialog templates from resource files, they live on in keyboard.c

Secondary changes:
Support for font change, currently saved in registry is facename and height.
Additional registry load/save functions for strings to facilitate above change.

base/applications/osk/osk_res.h

@@ -5,9 +5,6 @@
  * COPYRIGHT:       Denis ROBERT
  */
 
-#define MAIN_DIALOG_ENHANCED_KB             2000
-#define MAIN_DIALOG_STANDARD_KB             2001
-
 #define IDI_SOUNDCLICK                      50
 
 #define IDC_LED_NUM                         100
@@ -49,8 +46,24 @@
 
 #define IDD_WARNINGDIALOG_OSK               215
 
-#define STRING_OSK                          500
-#define STRING_AUTHORS                      501
+#define IDS_OSK                             500
+#define IDS_AUTHORS                         501
+
+#define IDS_NUMLOCK                         502
+#define IDS_CAPSLOCK                        503
+#define IDS_SCROLLLOCK                      504
+
+#define IDS_ESCAPE                          505
+#define IDS_PRN                             506
+#define IDS_STOP                            507 /* SCROLL LOCK */
+#define IDS_ATTN                            508 /* PAUSE KEY */
+#define IDS_INSERT                          509
+#define IDS_NUMLOCKKEY                      510
+#define IDS_DELETE                          511
+#define IDS_END                             512
+#define IDS_CTRL                            513
+#define IDS_LEFTALT                         514
+#define IDS_RIGHTALT                        515
 
 #define IDC_STATIC                          -1