Noticed this while reviewing #13529, but it's also in master @ 5ba77df. On macOS 10.13.6:

<img width="209" alt="schermafbeelding 2018-08-01 om 16 22 09" src="https://user-images.githubusercontent.com/10217/43527498-0f571db4-95a7-11e8-8d90-7863947a7689.png">


<img width="178" alt="schermafbeelding 2018-08-01 om 16 12 51" src="https://user-images.githubusercontent.com/10217/43526994-c9a515ec-95a5-11e8-96b8-9e2513e9aac5.png">

* `Show` in the action menu doesn't work if the app was hidden by `Command + H`, it does work when hidden through this menu
* send and receive don't unhide the window when opened for the action menu. It does navigate to the right tab. The other actions do work (sign, verify & debug window)

Clicking "Toon" (= macOS native show) does work, suggesting the GUI uses some non-native method of hiding.
{
    disconnectViewHeadersSignals();
    resizeColumn(column, getAvailableWidthForColumn(column));
    connectViewHeadersSignals();
}
void TableViewLastColumnResizingFixer::on_sectionResized(int logicalIndex, int oldSize, int newSize)
{
    adjustTableColumnsWidth();
    int remainingWidth = getAvailableWidthForColumn(logicalIndex);
    if (newSize > remainingWidth)
    {
       resizeColumn(logicalIndex, remainingWidth);
    }
}
void TableViewLastColumnResizingFixer::on_geometriesChanged()
{
    if ((getColumnsWidth() - this->tableView->horizontalHeader()->width()) != 0)
    {
        disconnectViewHeadersSignals();
        resizeColumn(secondToLastColumnIndex, getAvailableWidthForColumn(secondToLastColumnIndex));
        connectViewHeadersSignals();
    }
}
/**
 * Initializes all internal variables and prepares the
 * the resize modes of the last 2 columns of the table and
 */
TableViewLastColumnResizingFixer::TableViewLastColumnResizingFixer(QTableView* table, int lastColMinimumWidth, int allColsMinimumWidth, QObject *parent) :