Improvements to home page customization (#1458)

## Description
Adds a few enhancements to home page customization:
- Add option to combined continue watching & next up to split it
- Add option to continue watching and next up rows to combine them
- Add option for sorting playlist or collections
- Show suggestions (recently updated) when searching for a playlist or
collection to add
- Better handling for loading vs unsupported types for suggestions

Also, the old toggle for combining continue watching & next up in
advanced settings is removed. Now by default the rows will be combined
unless changed in the home page customization settings.

### Related issues
Closes #340
Closes #1383
Closes #1350

### Testing
Just on the emulator so far

## Screenshots
N/A

## AI or LLM usage
None

app/src/main/res/values/strings.xml

@@ -820,4 +820,6 @@
     </array>
     <string name="stars">Stars</string>
     <string name="tomatoes">Tomatoes</string>
+    <string name="sort">Sort</string>
+    <string name="split_into_separate_rows">Split into separate rows</string>
 </resources>