fix #348, never remove the antialiasing flag of checklist items

Author: tibbi

app/src/main/kotlin/com/simplemobiletools/notes/pro/adapters/ChecklistAdapter.kt

@@ -158,10 +158,10 @@ class ChecklistAdapter(activity: BaseSimpleActivity, var items: ArrayList<Checkl
                 gravity = context.config.getTextGravity()
 
                 if (checklistItem.isDone) {
-                    paintFlags = Paint.STRIKE_THRU_TEXT_FLAG
+                    paintFlags = paintFlags or Paint.STRIKE_THRU_TEXT_FLAG
                     alpha = DONE_CHECKLIST_ITEM_ALPHA
                 } else {
-                    paintFlags = 0
+                    paintFlags = paintFlags or Paint.STRIKE_THRU_TEXT_FLAG - Paint.STRIKE_THRU_TEXT_FLAG
                     alpha = 1f
                 }
             }

app/src/main/kotlin/com/simplemobiletools/notes/pro/adapters/WidgetAdapter.kt

@@ -46,7 +46,7 @@ class WidgetAdapter(val context: Context, val intent: Intent) : RemoteViewsServi
                 setTextColor(checklist_title, widgetNewTextColor)
                 setTextSize(checklist_title, textSize)
 
-                val paintFlags = if (checklistItem.isDone) Paint.STRIKE_THRU_TEXT_FLAG or Paint.ANTI_ALIAS_FLAG else 0
+                val paintFlags = if (checklistItem.isDone) Paint.STRIKE_THRU_TEXT_FLAG or Paint.ANTI_ALIAS_FLAG else Paint.ANTI_ALIAS_FLAG
                 setInt(checklist_title, "setPaintFlags", paintFlags)
 
                 Intent().apply {