xpbar: add option to not overlap the xpbars

modules/xpbar.lua

@@ -199,6 +199,14 @@ end
     b.position = t == "XP" and C.panel.xp.xp_position or C.panel.xp.rep_position
     b.display = t == "XP" and C.panel.xp.xp_display or C.panel.xp.rep_display
 
+    local barStrata = "LOW"
+    local restedStrata = "MEDIUM"
+    
+    if C.panel.xp.dont_overlap == "1" then
+      barStrata = "MEDIUM"
+      restedStrata = "LOW"
+    end
+
     if t == "XP" and C.panel.xp.xp_always == "1" then
       b.always = true
     elseif t == "REP" and C.panel.xp.rep_always == "1" then
@@ -220,7 +228,7 @@ end
     b.bar:SetStatusBarTexture(pfUI.media["img:bar"])
     b.bar:ClearAllPoints()
     b.bar:SetAllPoints(b)
-    b.bar:SetFrameStrata("LOW")
+    b.bar:SetFrameStrata(barStrata)
 
     local cr, cg, cb, ca = pfUI.api.GetStringColor(b.xp_color)
     b.bar:SetStatusBarColor(cr,cg,cb,ca)
@@ -230,7 +238,7 @@ end
     b.restedbar:SetStatusBarTexture(pfUI.media["img:bar"])
     b.restedbar:ClearAllPoints()
     b.restedbar:SetAllPoints(b)
-    b.restedbar:SetFrameStrata("MEDIUM")
+    b.restedbar:SetFrameStrata(restedStrata)
     local cr, cg, cb, ca = pfUI.api.GetStringColor(b.rest_color)
     b.restedbar:SetStatusBarColor(cr,cg,cb,ca)
     b.restedbar:SetOrientation(b.mode)