Make retro-compatible to 7.8.4 and older versions for recorded macro

In the following commit (521ff86665) IDC_FINDNEXT & IDC_FINDPREV are removed from macro record and play. This change broke old macro playing if IDC_FINDNEXT or IDC_FINDPREV was recorded in the macro:
https://community.notepad-plus-plus.org/topic/19011/notepad-v7-8-5-released

Adding IDC_FINDNEXT or IDC_FINDPREV & making them treated as IDOK make fix this broken issue.

PowerEditor/src/ScitillaComponent/FindReplaceDlg.cpp

@@ -2660,6 +2660,8 @@ void FindReplaceDlg::execSavedCommand(int cmd, uptr_t intValue, const generic_st
 				NppParameters& nppParamInst = NppParameters::getInstance();
 				switch (intValue)
 				{
+					case IDC_FINDNEXT: // retro-compatible to 7.8.4 and older versions
+					case IDC_FINDPREV: // retro-compatible to 7.8.4 and older versions
 					case IDOK:
 						nppParamInst._isFindReplacing = true;
 						processFindNext(_env->_str2Search.c_str());