This patch on 3 files - AceGUI, AceConfigRegistry and AceConfigDialog - allows for the use of a 'newline' parameter in the options table, resulting in forcible placing of that option in a new row in a GUI.

--- AceGUI-3.0/AceGUI-3.0.lua  (revision 828)
+++ AceGUI-3.0/AceGUI-3.0.lua  (working copy)
@@ -25,7 +25,7 @@
 -- @class file
 -- @name AceGUI-3.0
 -- @release $Id$
-local ACEGUI_MAJOR, ACEGUI_MINOR = "AceGUI-3.0", 25
+local ACEGUI_MAJOR, ACEGUI_MINOR = "AceGUI-3.0", 26
 local AceGUI, oldminor = LibStub:NewLibrary(ACEGUI_MAJOR, ACEGUI_MINOR)
 
 if not AceGUI then return end -- No upgrade needed
@@ -751,7 +751,7 @@
             else
                 -- if there isn't available width for the control start a new row
                 -- if a control is "fill" it will be on a row of its own full width
-                if usedwidth == 0 or ((framewidth) + usedwidth > width) or child.width == "fill" then
+                if usedwidth == 0 or ((framewidth) + usedwidth > width) or child.width == "fill" or child.newline then
                     --anchor the previous row, we will now know its height and offset
                     rowstart:SetPoint("TOPLEFT",content,"TOPLEFT",0,-(height+(rowoffset-rowstartoffset)+3))
                     height = height + rowheight + 3
--- AceConfig-3.0/AceConfigRegistry-3.0/AceConfigRegistry-3.0.lua  (revision 828)
+++ AceConfig-3.0/AceConfigRegistry-3.0/AceConfigRegistry-3.0.lua  (working copy)
@@ -9,7 +9,7 @@
 -- @class file
 -- @name AceConfigRegistry-3.0
 -- @release $Id$
-local MAJOR, MINOR = "AceConfigRegistry-3.0", 10
+local MAJOR, MINOR = "AceConfigRegistry-3.0", 11
 local AceConfigRegistry = LibStub:NewLibrary(MAJOR, MINOR)
 
 if not AceConfigRegistry then return end
@@ -83,6 +83,7 @@
     func=optmethodfalse,
     arg={["*"]=true},
     width=optstring,
+    newline=optbool,
 }
 
 local typedkeys={
--- AceConfig-3.0/AceConfigDialog-3.0/AceConfigDialog-3.0.lua  (revision 828)
+++ AceConfig-3.0/AceConfigDialog-3.0/AceConfigDialog-3.0.lua  (working copy)
@@ -4,7 +4,7 @@
 -- @release $Id$
 
 local LibStub = LibStub
-local MAJOR, MINOR = "AceConfigDialog-3.0", 34
+local MAJOR, MINOR = "AceConfigDialog-3.0", 35
 local AceConfigDialog = LibStub:NewLibrary(MAJOR, MINOR)
 
 if not AceConfigDialog then return end
@@ -1311,6 +1311,9 @@
                             control:SetWidth(width_multiplier)
                         end
                     end
+
+                    control.newline = GetOptionsMemberValue("newline",v,options,path,appName) --sinus
+                        
                     if control.SetDisabled then
                         local disabled = CheckOptionDisabled(v, options, path, appName)
                         control:SetDisabled(disabled)