kcms/style: Add ellipsis to configure button text
Reason for the change
The HIG state that buttons that open a dialog should end in "…" to indicate to the user that further action will be required. Currently, the "Configure Icons and Toolbars" button in kcm_style is missing this ellipsis. This change adds it to the button text.
Test plan
Compiles and works. It's a very simple change; I have no plans for further testing.
Screenshots or screen recordings
| Before | After |
|---|---|
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kcmstlye-after |
