fix(core): use ListView for SettingsPanel

[YoussefRaafatNasry]

Using the Column/Expanded combo inside SingleChildScrollView caused the following error due to the unconstrained expansion:

════════ Exception caught by widgets library ═══════════════════════════════════
RenderBox was not laid out: RenderMouseRegion#c3514 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
'package:flutter/src/rendering/box.dart':
box.dart:1
Failed assertion: line 1966 pos 12: 'hasSize'

The relevant error-causing widget was
DropdownMenu<DeviceInfo?>
dropdown_setting.dart:25
════════════════════════════════════════════════════════════════════════════════

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