Chore: Migrate Dialogs (DialogCoordinator) to ChildWindows

[BornToBeRoot]

Changes proposed in this pull request

ToDo

• Message / Message confirm dialogs
• Export dialogs
• PuTTYControl, TigerVNCControl, PowerShellControl - Target correct window
• ARPTableViewModel
• IPScannerSettingsViewModel
• IPScannerViewModel
• NetworkInterfaceViewModel
• PortScannerSettingsViewModel
• PortScannerViewModel
• RemoteDesktopHostViewModel
• SNMPSettingsViewModel
• SNMPViewModel
• TigerVNCHostViewModel
• WiFiViewModel
• Remove MahApps.Metro.Controls.Dialogs ref from files

Known issues:

• Focus issue in TigerVNC & WebConsole connect dialog (would be solved with a dummy textbox/combobox...)

Related issue(s)

• Fixes Replace _dialogCoordinator.ShowMessageAsync in Export() task #3265

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To-Do

• Update changelog to reflect this changes

Contributing

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• The code or resource is compatible with the GNU General Public License v3.0.