Help dialog should provide help

[bobpaul]

The help dialog doesn't actually provide any help and it's not immediately clear how some of the f3-qt gui correlates with the cli applications, especially the Cached option.

I propose a [Help] tab on the Help dialog. This should be the tab selected by default. Text could be something like:

Normal Operation:
Fill the freespace on the mounted card using f3write and read back the contents with f3read to check for corruption and determine the actual size of the card.

Advanced Operation (requires root):
The QuickTest option uses f3probe to quickly check a card by reading/writing directly to blocks.

• Destructive - Speed up the test and minimize memory usage by skipping restoration of written blocks.
• Use less memory - Slower test with block restoration but requires less memory.

Note in some cases (power is lost, application is closed, drive is counterfeit) the blocks might not fully/properly restored even if the destructive option is not used

If QuickTest is unchecked, the card will be mounted and f3write/f3read will be used to verify card.

• Cached - Read *.h2w files that are already on the card. Does not write new h2w files.

[zwpwjwtz]

Thanks for the suggestion. I will take time to implement it.