Revert "[kstyle]: Add double-ringed focus for text fields"
This reverts commit 2f351fe1.
The additional space required for the double-ringed focus looks out of place in widget applications. Worse, adding it to only one class of widgets is inconsistent.
Let's revert this until it gets implemented properly in a consistent way. See also !63 (closed) and the ongoing discussion there which seems to agree with me that this design decision has far-fetching implications and undesired issue due to the additional margins in a widget application.