Add a small glow effect to the segment skip button (#1228)

## Description
Adds a small glow to the border of the segment skip buttons, ie "Skip
Intro", etc. Since this button appears as focused immediately, there's
no contrast and it can be missed sometimes. So this glowing border draws
the eye a bit better.

Also a small change to reduce the minimum skip forward amount to 5
seconds .

### Related issues
Skip forward: #1203

### Testing
Emulator. But this needs some "real world" testing on a TV, too, so this
may need tweaking

## Screenshots


https://github.com/user-attachments/assets/5488d468-aee4-4448-a823-6326ccb003da

## AI or LLM usage
None

app/src/main/java/com/github/damontecres/wholphin/preferences/AppPreference.kt

@@ -60,7 +60,7 @@ sealed interface AppPreference<Pref, T> {
             AppSliderPreference<AppPreferences>(
                 title = R.string.skip_forward_preference,
                 defaultValue = 30,
-                min = 10,
+                min = 5,
                 max = 5.minutes.inWholeSeconds,
                 interval = 5,
                 getter = {