Class DBrowse:
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Class Browse is adapted for database editation. It could be more database
files with relations (conectedd through relations).


Common use:
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LOCAL OBJECT Db OF DBrowse                  //object creation
NET USE Personal                            //database opening
Db:Init()                                   //object initialisation
Db:AddBlock(,"Meno",,FieldBlock("Meno"))    //field is appended for editation
Db:AddBlock(,"Plat",,FieldBlock("Plat"))    //field is appended for editation


As all classes derived from Task, this class don't need processing of methods
Process() and Done(). Initialisation adds a new object of this class on the
top of the stack of classes, and following is a job for task swapper
(method Process() of class Task.)

Source code of class DBrowse is in  C_DBrows.prg