Previously the option in the camera's //Object Data Properties > Viewport Display > Sensor// would not display the sensor in camera view. This seemed to be caused by the theme color `TH_VIEW_OVERLAY` having zero set for the alpha channel and alpha blending being active, resulting in no visible output. Hence `immUniformThemeColorShade(TH_VIEW_OVERLAY, 100);` is replaced with `immUniformThemeColorShadeAlpha(TH_VIEW_OVERLAY, 100, 255);`. Reviewed By: mano-wii Differential Revision: https://developer.blender.org/D11075