1. Added the function for building an order grid. The grid direction is set by the 'Net option' parameter. The number of orders in each direction is taken from the 'Maximum deals with losses' parameter. The distance between the grid orders is taken from the 'Maximum distance to the same direction deal' parameter.
2. Added the button on the panel setting the signal strength. When the signal strength changes on the panel, the signal arrows on the symbol chart are redrawn.
3. Added trailing stop orders. It is enabled automatically if placing stop orders is selected ('Pending orders'<0).

Fixed an error in the "Set breakeven after bars" function.

Fixed an error in the description of the parameters.