How to make i3 contain "Always on top windows" in i3+KDE setup?

Question

The issue

The Plasma "Add Widget" window is always on top, and due to this i3wm is unable to tile it. Also, since it is outside i3's management, hence I can't focus on it as well, which prohibits me from providing any keyboard input to it.

Using xdootool to focus the window works as indicated by successful keyboard input.

My attempt to a solution

I'm thinking that somehow disabling the "Always on top" state of the concerned window will allow i3wm to take over the window management and hence everything should start working as expected.

xprop of window

WM_STATE(WM_STATE):
        window state: Normal
        icon window: 0x0
_NET_WM_USER_TIME(CARDINAL) = 4178541
_KDE_SLIDE(_KDE_SLIDE) = 0xffffffff, 0x0
_KDE_NET_WM_SHADOW(CARDINAL) = 71303409, 71303410, 71303411, 71303412, 71303413, 71303414, 71303415, 71303416, 10, 10, 1, 1
_KDE_NET_WM_BLUR_BEHIND_REGION(CARDINAL) = 0, 0, 326, 1, 0, 1, 327, 1, 0, 2, 328, 1050
_NET_WM_DESKTOP(CARDINAL) = 4294967295
_NET_WM_STATE(ATOM) = _NET_WM_STATE_SKIP_TASKBAR, _NET_WM_STATE_SKIP_PAGER, _NET_WM_STATE_ABOVE, _NET_WM_STATE_STAYS_ON_TOP
_KDE_NET_WM_DESKTOP_FILE(UTF8_STRING) = "org.kde.plasmashell"
XdndAware(ATOM) = BITMAP
WM_NAME(STRING) = 
_NET_WM_NAME(UTF8_STRING) = "Plasma"
_MOTIF_WM_HINTS(_MOTIF_WM_HINTS) = 0x2, 0x1, 0x0, 0x0, 0x0
_NET_WM_WINDOW_TYPE(ATOM) = _NET_WM_WINDOW_TYPE_DOCK
_XEMBED_INFO(_XEMBED_INFO) = 0x0, 0x1
WM_CLIENT_LEADER(WINDOW): window id # 0x4400015
WM_HINTS(WM_HINTS):
        Client accepts input or input focus: True
        window id # of group leader: 0x4400015
WM_CLIENT_MACHINE(STRING) = "Utkarsh-PC"
_NET_WM_PID(CARDINAL) = 14096
_NET_WM_SYNC_REQUEST_COUNTER(CARDINAL) = 71303192
WM_CLASS(STRING) = "plasmashell", "plasmashell"
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW, WM_TAKE_FOCUS, _NET_WM_PING, _NET_WM_SYNC_REQUEST
WM_NORMAL_HINTS(WM_SIZE_HINTS):
        user specified location: 0, 28
        user specified size: 328 by 1052
        window gravity: Static