Read functionality added

FEATURE
1. Reads linked list configuration from memory locations
2. Does not close the read configurations / Can give us scope to remove
PREV button

FEATURES MISSING:

1. EDIT : should be able to modify the READ configurations on the fly.
Currently USER needs to initialize the WRITE command separately to
modify

BUG :

Need to change the CHECKBOX feature to pull down menu

BUG FIX:

Fixed the problem with HEX format address. DIALOG.STRING reads out only
string value. Converting that to HEX needs appending by
"0x"+DIALOG.STRING() should work