EGO-L-003 warning

signals connected by extension should be disconnected in disable()

Signals assigned in `enable()` are missing matching disconnect calls in `disable()` or its helper methods.

Disconnect all signals

• extension.js:233

          this._toggle.connect('clicked', () => {
              this._state.enabled = this._toggle.checked;
              this._applyDNS();
          })

• extension.js:223

          this._toggle.connect('preset-selected', (t, id) => {
              this._state.preset = id;
              this._toggle.setActivePreset(id);
              if (!this._state.enabled) {
                  this._state.enabled = true;
                  this._toggle.checked = true;
              }
              t