Add fill attribute to pointer-up and pointer-down icons

[acelaya]

Add a missing fill="currentColor" attribute to PointerUp and PointerDown colors. I added it to the svg files, and then regenerated icons.

Notice the color difference of the two bottom-left icons compored to the rest.

Before:

After:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (b38f90b) to head (53c1f32).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1586 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 62 62 Lines 1041 1041 Branches 397 397 ========================================= Hits 1041 1041 ```

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