startup: suppress "Search Wrapped" when using +? to search from EOF

When using +/ or +?, any minor feedback should be cleared,
to not distract from the highligted search result.

This fixes https://savannah.gnu.org/bugs/?60669.

Bug existed since version 5.5, commit b86f7868,
since the manner of grading status-bar messages changed.

src/nano.c

@@ -2433,7 +2433,7 @@ int main(int argc, char **argv)
 			if (!findnextstr(searchstring, FALSE, JUSTFIND, NULL,
 							ISSET(BACKWARDS_SEARCH), openfile->filetop, 0))
 				not_found_msg(searchstring);
-			else if (lastmessage == HUSH)
+			else if (lastmessage <= REMARK)
 				wipe_statusbar();
 			openfile->placewewant = xplustabs();
 			if (ISSET(USE_REGEXP))

src/winio.c

@@ -1670,6 +1670,7 @@ void wipe_statusbar(void)
 {
 	blank_row(bottomwin, 0);
 	wnoutrefresh(bottomwin);
+	lastmessage = VACUUM;
 }
 
 /* Blank out the two help lines (when they are present). */