applet: use standard section headers
Same deal as plasma-workspace!5589 (merged); we have them, so we might as well use them. This lets us get rid of a bunch of complex and fragile code that's responsible for the existing separator.
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Same deal as plasma-workspace!5589 (merged); we have them, so we might as well use them. This lets us get rid of a bunch of complex and fragile code that's responsible for the existing separator.
| Before | After |
|---|---|
|
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