WebGadget() add Flag for Link_LBUTTONDBLCLK

[gurj]

WebGadget() add Flag for Link_LBUTTONDBLCLK
WebGadget() add Flag: #Link_LBUTTONDBLCLK_NotGoto and #Link_LBUTTONDBLCLK_Goto
WebGadget() add #PB_EventType_Link_LBUTTONDBLCLK
GetGadgetItemText() add #PB_Web_LinkTitle_LBUTTONDBLCLK and #PB_Web_LinkUrl_LBUTTONDBLCLK
<a href="bbb">ccc</a>:
LinkTitle="ccc"
LinkUrl="bbb"
#Link_LBUTTONDBLCLK_NotGoto, but promise Change the current URL on WebGadget() by SetGadgetText().