Add low battery notifications, improve device detection fallback by name, and fix tray icon rendering

[elazarit]

Motivation

1. Provide an optional low-battery balloon notification so users can be alerted when headset battery is low.
2. Expose configuration for enabling the popup and setting the threshold from the existing Settings UI and persisted settings file.
3. Improve device detection reliability by adding a fallback mechanism to identify supported headsets by product name when Product IDs change due to firmware updates.
4. Fix an intermittent issue where the system tray icon could appear blank on some systems due to icon handle lifetime management.

Description

1. Added a lowBatteryPopupShown flag and logic in MainForm to show a single balloon tip when the battery level is non-zero and at-or-below the configured threshold, and reset the flag when appropriate in disconnected/no-device states.
2. Added UI controls to SettingsForm (cbLowBatteryPopup and numLowBatteryPopup) and wired them to load/save settings via SettingsHelper so users can enable the popup and set the percentage threshold.
3. Extended SettingsHelper (SettingsHelper.h / SettingsHelper.cpp) with:

• getLowBatteryPopupEnabled
• setLowBatteryPopupEnabled
• getLowBatteryPopupLevel
• setLowBatteryPopupLevel
  to persist the new settings.

4. Added default values for the new settings to settings.xml and cleaned up object lifetime management where SettingsHelper instances are created and deleted.
5. Improved headset detection robustness by adding a fallback detection path in getHeadsetDevicePath() that:
   -Enumerates all HID devices
   -Identifies supported headsets by vendor ID and product name

• Re-enumerates using the detected VID/PID
  -This ensures compatibility with devices where firmware updates change Product IDs while keeping the product name consistent.

6. Extended special-case detection logic for Cloud III Wireless and Cloud III S Wireless to also validate the product string in addition to Product ID, improving resilience against firmware revisions.
7. Fixed a system tray icon rendering issue by improving icon lifetime management:
   -Generated tray icons are now cloned into managed Icon instances before destroying the underlying unmanaged HICON

• Added tracking and disposal of previously generated tray icons to prevent managed/GDI resource leaks
• Preserved the existing fix for unmanaged handle leaks while ensuring the tray icon remains valid for asynchronous shell rendering