minimap icon error and shortened table keys

- fixed lua error (detected on classic wrath) when the mouse leaves Skada's minimap button.
- shortened Auras and CC modules table keys.
- update zhCN thanks to @justinqian42
- small checks and changes.

Skada/Core/Core.lua

@@ -1881,6 +1881,11 @@ function Skada:CanReset()
 	end
 
 	local sets = self.sets
+
+	if not sets then
+		return false
+	end
+
 	for i = 1, #sets do
 		local set = sets[i]
 		if set and not set.keep then
@@ -2115,7 +2120,7 @@ function dataobj:OnEnter()
 end
 
 function dataobj:OnLeave()
-	self.tooltip:Hide()
+	(self.tooltip or GameTooltip):Hide()
 end
 
 function dataobj:OnClick(button)

Skada/Core/Options.lua

@@ -51,6 +51,7 @@ Skada.windowdefaults = {
 		borderthickness = 2,
 		borderinsets = 0,
 		toolbar = 1,
+		toolbaropacity = 0.5,
 		spacing = 1
 	},
 	background = {

Skada/Locales/zhTW.lua

@@ -1,7 +1,7 @@
 local L = LibStub("AceLocale-3.0"):NewLocale(..., "zhTW")
 if not L then return end
 
-L["A damage meter."] = "一個傷害統計。"
+L["A damage meter."] = "模組化的傷害統計。"
 L["Memory usage is high. You may want to reset Skada, and enable one of the automatic reset options."] = "記憶體使用過高，你或許想要重置Skada，並且啟用一個自動重設的選項。"
 L["Skada is out of date. You can download the newest version from \124cffffbb00%s\124r"] = "Skada 已過期. 你可以在 \124cffffbb00%s\124r 下載到最新的版本."
 L["Skada: Modes"] = "Skada:模組"