rename "Open new folders in tabs" option to "Open new folders in windows" with invertion
https://bugs.kde.org/show_bug.cgi?id=440663#c74
(In reply to @ngraham from comment #35 (closed))
When the "Open new folders in tabs" and "Show on Startup: Folder, tabs, and window state from last time" options are in use, everything is fine. When one or both are unchecked, the issue re-appears.
Actually it's the option name just misleading. When "Open new folders in tabs" is unchecked, it doesn't even try to attach to existing Dolphin instances and opens a new window(s) unconditionally. So the option should be inverted and named something like: "Open new folders in windows" instead.
Whether or not to open a new tabs is actually depends on if the containing dir is opened anywhere in one of existing Dolphin instances.