Unreachable code in ISC_Grids.js and ISC_Forms.js

[Crack]

When preparing for upgrade to SC 10 I noticed that Firefox warns about two cases of unreachable code in SmartClient 10.0 (v10.0p_2015-09-24/PowerEdition):

1. modules-debug/ISC_Grids.js:81678 (handleRightMouseDown), looks like runaway "return returnVal":

            return this.Super("handleRightMouseDown", arguments);
            return returnVal;

2. modules-debug/ISC_Forms.js:54774 (refreshDisplayValue), method does nothing:

        return;
        if (this._loadingData()) return;

        if (this._pendingElementValue) return;
        return this.Super("refreshDisplayValue", arguments);