ESC key clears function list filter & search result

Even the focus is not on filter field but on one of tree view entries.

Fix #11063, close #11064

PowerEditor/src/WinControls/FunctionList/functionListPanel.cpp

@@ -608,6 +608,7 @@ void FunctionListPanel::notified(LPNMHDR notification)
 				}
 				else if (ptvkd->wVKey == VK_ESCAPE)
 				{
+					::SendMessage(_hSearchEdit, WM_SETTEXT, 0, reinterpret_cast<LPARAM>(TEXT("")));
 					SetWindowLongPtr(_hSelf, DWLP_MSGRESULT, 1); // remove beep
 					PostMessage(_hParent, WM_COMMAND, SCEN_SETFOCUS << 16, reinterpret_cast<LPARAM>((*_ppEditView)->getHSelf()));
 				}