[fix] do not submit form if there is no search query - fixes #341
[fix] do not submit form if there is no search query - fixes #341

dzc34/searx,PwnArt1st/searx,framasoft/searx,misnyo/searx,matejc/searx,kdani3/searx,matejc/searx,dalf/searx,gugod/searx,matejc/searx,jibe-b/searx,misnyo/searx,pointhi/searx,dalf/searx,gugod/searx,jpope777/searx,GreenLunar/searx,jibe-b/searx,PwnArt1st/searx,pointhi/searx,jcherqui/searx,dzc34/searx,jcherqui/searx,jpope777/searx,pointhi/searx,jpope777/searx,matejc/searx,misnyo/searx,kdani3/searx,framasoft/searx,asciimoo/searx,jpope777/searx,asciimoo/searx,gugod/searx,potato/searx,jibe-b/searx,asciimoo/searx,potato/searx,kdani3/searx,jcherqui/searx,dalf/searx,GreenLunar/searx,kdani3/searx,PwnArt1st/searx,potato/searx,potato/searx,dzc34/searx,GreenLunar/searx,misnyo/searx,asciimoo/searx,GreenLunar/searx,dzc34/searx,pointhi/searx,jibe-b/searx,dalf/searx,jcherqui/searx,framasoft/searx,gugod/searx,framasoft/searx,PwnArt1st/searx