Description:
If you assign `Font Color` function to a shortcut key and try to apply this shortcut key to a cell with existing font to change its color, it does not change the color, it instead opens `Format Cells` dialog with focus in the `Font` tab.

Steps to Reproduce:
1. Open new spreadsheet

2. Open `Customize` dialog
3. Select the `Keyboard` tab
3. Assign `Font Color` function to a shortcut key
4. Close dialog

4. In spreadsheet type text in a cell using default black/white font color.
5. Now click on a blank cell before going any further

6. Open toolbar `Font Color` drop down
7. Select color red

TEST A = WORKS AS EXPECTED
8. Now select the cell you typed in
9. Hit the `Font Color` icon in toolbar
10. Should see that font color go from black/white to red

TEST B = ISSUE
8. Now select the cell you typed in
9. Hit shortcut key you assigned to `Font Color` function
10. You will notice that font color does not apply, instead it opens up `Format Cells` dialog with focus in the `Font` tab

Actual Results:
`Font Color` shortcut opens up `Format Cells` dialog with focus in the `Font` tab, instead of just applying the font color to selected cells text.

Expected Results:
To have `Font Color` shortcut just apply the current color being displayed by the `Font Color` toolbar icon.


Reproducible: Always


User Profile Reset: No

Additional Info:
VERSIONS TESTED
24.8.4.2 deb installed version
and 
Official LibreOffice-fresh.basic-x86_64.AppImage
Version: 25.8.2.2 (X86_64)

SOMEWHAT RELATED ISSUE
I had originally found a similar issue with `Background Color` function and made a post about it, but was told that it was a duplicate of this post issue, so I commented on this post found here
https://bugs.documentfoundation.org/show_bug.cgi?id=138722

Hope all of this helps