Possible fix for: Checkboxes invisible in dark mode on Permissions dialog

[Nigel1992]

Summary:
In dark theme the Status column checkboxes on the Permissions dialog are invisible (checkmarks blend into the background).

Steps to reproduce:

1. Switch to dark theme.
2. Open Settings → Feature permissions (Permissions dialog).
3. Observe the Status column: checked items show no visible checkmark.

Expected:

• Checkboxes are clearly visible in both light and dark themes.

Actual:

• Checkboxes appear invisible / checkmarks blend into the background in dark theme.

Likely cause:

• Status cells use a hardcoded icon or decoration that doesn't adapt to the current palette/QStyle.

Concrete fix:

• Let Qt draw theme-aware checkboxes instead of using custom icons:

auto *item = new QTableWidgetItem();
item->setFlags(item->flags() | Qt::ItemIsUserCheckable);
item->setCheckState(isAllowed ? Qt::Checked : Qt::Unchecked);
table->setItem(row, statusColumn, item);

• If custom icons are required, use monochrome SVGs and tint them with the current palette (e.g. QApplication::palette().color(QPalette::WindowText)) or provide light/dark variants and switch based on the palette.

Where to change:

• Update permissiondialog.cpp where the Status column is populated to use setCheckState() or theme-aware icons.