OO-503 support for galician language: gl_ES flag

src/main/webapp/static/themes/openolat/all/_icons.scss

@@ -138,11 +138,7 @@ a.b_small_icon:hover {
 .b_flag_bg {background-image: url('../openolat/images/flags/bg.png');}
 .b_flag_hi_IN_ASIA {background-image: url('../openolat/images/flags/in.png');}
 .b_flag_ar_LB {background-image: url('../openolat/images/flags/lb.png');}     
-.b_flag_de_FX_business 	{background-image: url('../openolat/images/flags/de.png');}
-.b_flag_de_FX_school 	{background-image: url('../openolat/images/flags/de.png');}	
-.b_flag_en_FX_business 	{background-image: url('../openolat/images/flags/gb.png');}
-.b_flag_en_FX_school 	{background-image: url('../openolat/images/flags/gb.png');}
-
+.b_flag_gl_ES {background-image: url('../openolat/images/flags/galicia.png');}     
 
 /** ------- FILE TYPES ------- **/
 	/* first the default that is used as base class. will be overriden by following classes */