FOUR stupid issues with the PAD config UI

[kirbypuff]

Issue #1: The 'Angle' , 'Radius' and 'Threshold' values in the pad UIs automatically decrement by 1 upon saving.
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Steps to reproduce the issue:

- Set the 'Angle' or 'Radius' value in the pad settings GUI to some value (like 90) and save the config.
- Open the pad settings again and see the difference.


Issue #2: The red dot doesn't appear when A-sticks are pressed fully to the right ! (at exactly 90 degrees).
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Steps to reproduce the issue:

- Try it with a DInput pad.


Issue #3: The per-pad "Background Input" setting got broken in the latest dev builds. (it worked perfectly in older / stable builds)
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Steps to reproduce the issue:

- Enable "Background Input" for PAD1 only, then disable it for pads 2,3 and 4 and save the settings. Open the PAD UI. Now *ALL* 4 pads have background input enabled (!)
- Now disable "Background Input" for pads 2,3 and 4 (leave the PAD1 setting to "enabled"), save the settings and re-open the PAD UI. Background input gets dsabled for ALL 4 PADs (!)


Issue #4: Inconsistency with the analog stick settings.
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Why is the "Circle Stick" option not available for GCPad sticks, the Stick in the "Nunchuk" and the sticks in the "Classic" extension?
Why not have all 3 options (deadzone, radius and circle stick) available to every analog stick?