Resets to defaults if not.
If the min/max were set to the same value then this will lead to div-by-zero errors.
If the min was set to a greater value then this would lead to negative values and underflow in the battery remaining calculations. This would affect the OSD, dashboard, various telemetries, LED strip, and the Configurator.
Improves menu readability by changing the background from a transparent display of the camera image to a static opaque gray background.
The behavior is controlled with the `osd_menu_background` parameter which defaults to `TRANSPARENT` to preserve the previous behavior. Other opaque options are available:
```
osd_menu_background = TRANSPARENT
Allowed values: TRANSPARENT, BLACK, GRAY, LIGHT_GRAY
```
The background setting is available in the CMS OSD menu and the user can cycle through the various options with the display updating in real-time.
Currently only the onboard MAX7456-based OSD is supported, but the implementation adds `displayPort` support so it can easily be extended to other OSD devices if those manufacturers want to add support. Also can be extended to other background types (like colors, varying transparency, etc.) for future device support.
Makes use of the built-in MAX7456 feature to display all transparent pixels as "gray". The MAX7456 display area seems to be a few scan lines smaller than the actual camera video image so it's normal for some of the camera image to "leak" at the top/bottom of the display. The OSD display area can be adjusted up/down using the `vcd_v_offset` setting if desired.
The logic that uses the sample table size is:
```
```
So a setting of 1 would result in div-by-zero later in the code. A setting of 0 would result in division by -1 causing altitude measurements to be inverted. This could lead to a safety issue with GPS Rescue and a flyaway as it attemts to climb to altitude.
The default value is 21 and fortunately this was a setting that users were unlikely to have changed.
Function SD_Init() is called as follows:
./main/msc/usbd_storage_sdio.c: if (SD_Init() != 0) {
./main/drivers/sdcard_sdio_baremetal.c: if (SD_Init() != 0) {
./main/drivers/sdcard_sdio_baremetal.c: if (SD_Init() != 0) {
and checks whether return value is != 0, that is != SD_OK.
Previous implementation is working, however, cannot handle proper
SD_Error_t handling. In addition the code was refactored and simplified.
