Add resolution_fit option in theme plugin.

INSTALL/grub/debug.cfg

@@ -24,7 +24,10 @@ submenu "$VTLANG_RESOLUTION_CFG" --class=debug_resolution --class=F5tool {
         menuentry "$vtCurMode $vtActive" --class=debug_videomode --class=debug_resolution --class=F5tool VTOY_RUN_RET {
             terminal_output console
             set gfxmode=$1
-            terminal_output gfxterm
+            terminal_output gfxterm            
+            if [ "$vtoy_res_fit" = "1" ]; then
+                vt_set_theme switch
+            fi
         }
 
         vt_incr vdid 1

INSTALL/grub/grub.cfg

@@ -2555,7 +2555,11 @@ elif [ "$vtoy_display_mode" = "serial_console" ]; then
     fi
     terminal_input   serial console
     terminal_output  serial console    
-else    
+else
+    if [ "$vtoy_res_fit" = "1" ]; then
+        terminal_output  gfxterm
+    fi
+
     if [ -n "$vtoy_theme" ]; then
         vt_set_theme
     else