Visibility of images on light background

[Pragati-mfsi]

When selecting a white background or a light theme for the dm3 widget, several images are not visible because they are also in white color. This affects the following elements:

1. DM3 Logo: The DM3 logo is not properly visible on a white background.
2. Disconnect Wallet Image: The icon for the disconnect wallet is not visible due to the white color.
3. Icons for the Following Sections:
   - About
   - Terms & Conditions
   - Privacy Notice