0030537: Visualization - wrapping text in font text formatter

0030537: Visualization - wrapping text in font text formatter

Font_TextFormatter inherits Standard_Transient, now it is given as a handle in functions.
Graphic3d_Text - extended with Font_TextFormatter to be able to have it filled out of text render. If it is not defined here, the default text formatter of context is used.
OpenGl_Context - has default Font_TextFormatter for rendering OpenGl_Text.

(cherry picked from commit 088d118ab9e3693a01c4c41e2bdad57c69d17bc9)