Save cursor and restore more modes

Fixes #1526

src/common/services/CharsetService.ts

@@ -14,6 +14,10 @@ export class CharsetService implements ICharsetService {
 
   private _charsets: (ICharset | undefined)[] = [];
 
+  public get charsets(): (ICharset | undefined)[] {
+    return this._charsets;
+  }
+
   public reset(): void {
     this.charset = undefined;
     this._charsets = [];

src/common/services/Services.ts

@@ -116,6 +116,7 @@ export interface ICharsetService {
 
   charset: ICharset | undefined;
   readonly glevel: number;
+  readonly charsets: (ICharset | undefined)[];
 
   reset(): void;