feat: force full screen for x86

[nicomiguelino]

Issues Fixed

• Using frame buffer for display wouldn't work for x86 devices running balenaOS.
• With feat: Add support for x86 devices running balenaOS #2409, X11 will be used for display.
• Even though it works, the assets are not being displayed properly. They are scaled down to about 5%.

Description

• This pull request forces full screen in the web view.

Checklist

• I have performed a self-review of my own code.
• New and existing unit tests pass locally and on CI with my changes.
• I have done an end-to-end test for Raspberry Pi devices.
• I have tested my changes for x86 devices.
• I added a documentation for the changes I have made (when necessary).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[nicomiguelino]

Check if this works for Pi devices as well. If not, wrap this inside macros.