Fix bugs with "Hide Omen on 0 bars" option not working properly.

Omen.lua

@@ -349,6 +349,7 @@ function Omen:CreateFrames()
 	self.BarList:SetPoint("BOTTOMRIGHT", self.Anchor, "BOTTOMRIGHT")
 	self.BarList:SetScript("OnMouseDown", startmoving)
 	self.BarList:SetScript("OnMouseUp", stopmoving)
+	self.BarList.barsShown = 0
 
 	-- Create resizing corner grip
 	self.Grip = CreateFrame("Button", "OmenResizeGrip", self.BarList)
@@ -459,6 +460,7 @@ function Omen:PLAYER_LOGIN()
 	self:UpdateBackdrop()
 	self:UpdateTitleBar()
 	self:UpdateGrips()
+	self:ClearAll()
 	self:UnregisterEvent("PLAYER_LOGIN")
 
 	if LDB then
@@ -634,7 +636,10 @@ end
 
 -- For public use
 function Omen:Toggle(setting)
-	manualToggle = true
+	-- Don't set the manualToggle flag is "Hide Omen on 0 bars" option is active
+	if not (db.Autocollapse and db.CollapseHide) then
+		manualToggle = true
+	end
 	return self:_toggle(setting)
 end
 
@@ -675,6 +680,11 @@ function Omen:UpdateVisible(event)
 		show = false
 	end
 
+	-- Hide if Autocollapse and Hide Omen on 0 Bars are both active and there are 0 bars.
+	if db.Autocollapse and db.CollapseHide and self.BarList.barsShown == 0 then
+		show = false
+	end
+
 	self:_toggle(show)
 end
 
@@ -994,6 +1004,7 @@ do
 			bar.Text3:SetText(L["TPS"])
 			color = db.Bar.HeadingBGColor
 			bar.texture:SetVertexColor(color.r, color.g, color.b, color.a)
+			bar:Hide()
 		elseif barID == 1 then
 			-- Parent our TPS update frame to the first bar, so that TPS updates
 			-- updates happen when at least 1 bar (the first bar) is shown.
@@ -1255,7 +1266,15 @@ end
 
 local queried = false
 function Omen:UpdateBars()
-	if not self.Anchor:IsShown() and not db.CollapseHide then return end
+	if db.Autocollapse and db.CollapseHide then
+		-- Update the visibility because it could have been hidden on 0 bars
+		self.BarList.barsShown = 1 -- Dummy value
+		self:UpdateVisible()
+	end
+	if not self.Anchor:IsShown() then
+		self.BarList.barsShown = 0
+		return
+	end
 
 	-- TODO: Put a update throtle on this function
 
@@ -1466,8 +1485,8 @@ function Omen:UpdateBars()
 	if db.Autocollapse then
 		self.Anchor:SetHeight((i-1)*dbBar.Height + (i-2)*dbBar.Spacing + self.Title:GetHeight() + inset)
 	end
-	self.Anchor:Show()
 	self.BarList:Show()
+	self.BarList.barsShown = dbBar.ShowHeadings and i-2 or i-1
 
 	-- Threat warnings
 	if testMode then
@@ -1507,10 +1526,11 @@ function Omen:ClearAll()
 	if db.Autocollapse then
 		self.Anchor:SetHeight(self.Title:GetHeight())
 		self.BarList:Hide()
-		if db.CollapseHide and not self.Anchor.IsMovingOrSizing then
+		if db.CollapseHide and not self.Anchor.IsMovingOrSizing and not manualToggle then
 			self.Anchor:Hide()
 		end
 	end
+	self.BarList.barsShown = 0
 	-- Store last scanned mob GUID
 	lastWarn.mobGUID = nil
 	lastWarn.threatpercent = 0
@@ -1840,6 +1860,12 @@ local options = {
 							type = "toggle",
 							name = L["Hide Omen on 0 bars"],
 							desc = L["Hide Omen entirely if it collapses to show 0 bars"],
+							set = function(info, value)
+								db.CollapseHide = value
+								if value then manualToggle = false end
+								Omen:UpdateVisible()
+								Omen:UpdateBars()
+							end,
 						},
 						NumBars = {
 							order = 4,