feat(import tab): remove discriminator alert when the account name field is empty (#9500)

Author: Goufix

src/Classes/ImportTab.lua

@@ -70,7 +70,7 @@ local ImportTabClass = newClass("ImportTab", "ControlHost", "Control", function(
 	end
 	self.controls.accountNameGo.tooltipFunc = function(tooltip)
 		tooltip:Clear()
-		if not self.controls.accountName.buf:match("[#%-]%d%d%d%d$") then
+		if not self.controls.accountName.buf:match("[#%-]%d%d%d%d$") and self.controls.accountName.buf ~= "" then
 			tooltip:AddLine(16, "^7Missing discriminator e.g. " .. self.controls.accountName.buf .. "#1234")
 		end
 	end
@@ -97,7 +97,7 @@ local ImportTabClass = newClass("ImportTab", "ControlHost", "Control", function(
 
 	self.controls.accountNameMissingDiscriminator = new("LabelControl", {"TOPLEFT",self.controls.accountName,"BOTTOMLEFT"}, {0, 8, 0, 16}, "^1Missing discriminator e.g. #1234")
 	self.controls.accountNameMissingDiscriminator.shown = function()
-		return not self.controls.accountName.buf:match("[#%-]%d%d%d%d$")
+		return not self.controls.accountName.buf:match("[#%-]%d%d%d%d$") and self.controls.accountName.buf ~= ""
 	end
 
 	self.controls.accountNameUnicode = new("LabelControl", {"TOPLEFT",self.controls.accountRealm,"BOTTOMLEFT"}, {0, 34, 0, 14}, "^7Note: if the account name contains non-ASCII characters it must be pasted into the textbox,\nnot typed manually.")