if TERM contains 'xfce', sextants are go

src/lib/terminfo.c

@@ -56,7 +56,7 @@ apply_term_heuristics(tinfo* ti, const char* termname){
     // be RGB(0, 0, 0) (the default). we could also just set it, i guess.
     ti->bg_collides_default = 0x1000000;
     ti->sextants = true; // work since bugfix in 0.19.3
-  }else if(strstr(termname, "vte") || strstr(termname, "gnome")){
+  }else if(strstr(termname, "vte") || strstr(termname, "gnome") || strstr(termname, "xfce")){
     ti->sextants = true; // VTE has long enjoyed good sextant support
   }
   // run a wcwidth() to guarantee libc Unicode 13 support