sdl: Consistently avoid grabbing input for text consoles

There were some preexisting bits that released the input when switching
to text console. This patch spreads this logic consistently and also
avoids grabbing the input while a text console is active.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

ui/sdl.c

@@ -564,8 +564,9 @@ static void toggle_full_screen(DisplayState *ds)
         } else {
             do_sdl_resize(ds_get_width(ds), ds_get_height(ds), 0);
         }
-        if (!gui_saved_grab)
+        if (!gui_saved_grab || !is_graphic_console()) {
             sdl_grab_end();
+        }
     }
     vga_hw_invalidate();
     vga_hw_update();
@@ -689,8 +690,10 @@ static void sdl_refresh(DisplayState *ds)
                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
                                    from blocking all the application
                                    (SDL bug). */
-                                if (SDL_GetAppState() & SDL_APPACTIVE)
+                                if (is_graphic_console() &&
+                                    SDL_GetAppState() & SDL_APPACTIVE) {
                                     sdl_grab_start();
+                                }
                             } else {
                                 sdl_grab_end();
                             }
@@ -721,7 +724,7 @@ static void sdl_refresh(DisplayState *ds)
             break;
         case SDL_MOUSEBUTTONDOWN:
         case SDL_MOUSEBUTTONUP:
-            {
+            if (is_graphic_console()) {
                 SDL_MouseButtonEvent *bev = &ev->button;
                 if (!gui_grab && !kbd_mouse_is_absolute()) {
                     if (ev->type == SDL_MOUSEBUTTONDOWN &&