async openInputsPopover() {
      this.tempValue = this.value && this.isValid(this.value) ? this.value : this.getFormat().format(new Date());
      const popover = await this._getInputsPopover();
      popover.showAt(this);
      this._isInputsPopoverOpen = true;
    }
Opens the Inputs popover.
@async
@private
@method
@name sap.ui.webc.main.TimePickerBase#openInputsPopover
@returns {Promise} Resolves when the Inputs popover is open