fix of a normal bug (EXT-2448) [BSI] Notification toasts should resize when text is to long to be displayed

A maximum number of characters for textbox/texteditor could be set only through XML.
In case when a corresponding attribute was absent - the maximun number was set to 255, and there were no chance (no function) to change it.
So in this fix such a function was added.

--HG--
branch : product-engine

indra/llui/lltextbase.h

@@ -139,6 +139,7 @@ public:
 	// TODO: add optional style parameter
 	virtual void			setText(const LLStringExplicit &utf8str , const LLStyle::Params& input_params = LLStyle::Params()); // uses default style
 	virtual std::string		getText() const;
+	void					setMaxTextLength(S32 length) { mMaxTextByteLength = length; }
 
 	// wide-char versions
 	void					setWText(const LLWString& text);

indra/newview/lltoastnotifypanel.cpp

@@ -128,6 +128,7 @@ mAddedDefaultBtn(false)
 	// *TODO: magic numbers(???) - copied from llnotify.cpp(250)
 	const S32 MAX_LENGTH = 512 + 20 + DB_FIRST_NAME_BUF_SIZE + DB_LAST_NAME_BUF_SIZE + DB_INV_ITEM_NAME_BUF_SIZE; 
 
+	mTextBox->setMaxTextLength(MAX_LENGTH);
 	mTextBox->setVisible(TRUE);
 	mTextBox->setValue(notification->getMessage());