Fix docpack shortcut for sysfuncs in text editors

Docpack app has several help files included. Tinypad and CEdit run the
app to show one of sysfuncs.txt/sysfuncr.txt files. The text editors
pass a one-letter argument to specify the text file. It used to be 'f'
for sysfuncs, it has become 'e' recently. Update this one-letter
argument both in tinypad and cedit.

Resolve #216

programs/develop/cedit/SRC/CEdit.ob07

@@ -28,7 +28,7 @@ IMPORT
     RW, Ini, EB := EditBox, Tabs, Toolbar, SB := StatusBar;
 
 CONST
-    HEADER = "CEdit (27-feb-2025)";
+    HEADER = "CEdit (30-apr-2025)";
 
     ShellFilter = "";
     EditFilter = "sh|inc|txt|asm|ob07|c|cpp|h|pas|pp|lua|ini|json";