Add deleted and info background (#16)

Author: zasdaym

themes/vscode-dark-modern.json

@@ -106,7 +106,7 @@
         "created.background": null,
         "created.border": null,
         "deleted": "#F85149",
-        "deleted.background": null,
+        "deleted.background": "#F851491A",
         "deleted.border": null,
         "error": "#F14C4C",
         "error.background": "#1f1f1f",
@@ -121,7 +121,7 @@
         "ignored.background": null,
         "ignored.border": null,
         "info": "#3794FF",
-        "info.background": null,
+        "info.background": "#3794FF1A",
         "info.border": "#1E1E1E",
         "modified": "#E2C08D",
         "modified.background": null,