Add New Functions to RichSuggestBox - Get Raw Text And Content Edit

[ShimizuTheLotus]

Sometimes we have a need for get raw text from rich text. E.g., when we use this control as a email editor or something else, if we want to analysis what content it wrote, we should get the raw text from it.

Plus, we need to know where tokens begin and end. In my imagine it will work like this:

List<(uint,string,object)> TokenIndexList = richSuggestBox.GetTokenIndexList();//The beginning index, Tag string content, tag ID
string rawText = richSuggestBox.RawText;

Sometimes we may have to change the contents by code.

I believe it'll work like this:

richSuggestBox.Content.Clear();
richSuggestBox.Insert(uint index, object content);//content can be everything the RichSuggestBox can contains
richSuggestBox.Add(object content);
richSuggestBox.DeleteStringAt(uint index, uint length);
richSuggestBox.DeleteTokenByIndex(int index);//Find the token by index, if the index is in range of a token, delete that token
richSuggestBox.DeleteTokenByID(object ID);//Delete the token by ID