Placed the following in kdeglobals
[KDE Action Restrictions]
lineedit_reveal_password=false
No longer got said button on the lock screen and click area for the textfield also was as if the button was never there. Without aforementioned restriction it behaves like before.
As discussed in D3616
Depends on https://git.reviewboard.kde.org/r/129642/
Needs additional patch in plasma-nm. KNewPasswordDialog is in KWidgetsAddons which cannot depend on KConfigCore (where KAuthorized) is and thus we cannot do this there. However, being able to restrict this in the most prominent places should be good enoughâ„¢