Galaxy Button Lights

This is a simple app to let you choose how long the capacitive buttons (recent apps and back arrow) at the bottom of a Samsung Galaxy phone stay lit. You can choose a time duration, always on when the screen is on, always off, or reset to the default duration.
It has been tested on Verizon models of S6, S6 Edge, S6 Edge+, S7, and S7 Edge. Reviews say it works on other carrier models as well.
Also works on Galaxy Tab S2 Verizon and T-Mobile models. It will not work on the Tab A line because there are no lights behind the buttons in the Tab A line.
This may work on other Samsung devices like the Galaxy Note 5, but it has not been tested on other devices. It has not been tested on S6 models outside the USA so I cannot guarantee it will work on those devices.
App does NOT require root. It requires permission to write system settings so the changes can be saved.
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NOTE: If the app isn't working, please make sure power saving mode is off. The app cannot override the power saving mode. Also, if it doesn't turn them on, try turning power saving mode on then off since it can sometimes leave a setting in place. Thanks!
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Recent changes:
1.4
- Added scrolling in landscape mode to account for new phone types

1.3
- Added Default setting to get back to 1.5 seconds
- Changed app icon

1.2
- Added a check to display a "device not compatible" dialog if installed on a device without the needed settings.

1.1
- Added a dialog to see what the slider is being set to.
- Changed the slider scale from half second increments to whole seconds. Makes it easier to select the time you want and the half seconds didn't seem to matter too much.