TINY-664: make link_context_toolbar alterable after editor initialisation
TINY-664: make link_context_toolbar alterable after editor initialisation

danielpunkass/tinymce,gencer/tinymce,danielpunkass/tinymce,fillabs/TinySpecMCE,TeamupCom/tinymce,FernCreek/tinymce,aduth/tinymce,leofeyer/tinymce,blakewallan/tinymce,adaptiffdesigns/tinymce,MediehusetTek/tinymce,jtark/tinymce,danielpunkass/tinymce,ETSI-CTI/TinySpecMCE,tinymce/tinymce,MediehusetTek/tinymce,jtark/tinymce,TeamupCom/tinymce,ETSI-CTI/TinySpecMCE,fillabs/TinySpecMCE,aduth/tinymce,tinymce/tinymce,blakewallan/tinymce,FernCreek/tinymce,FernCreek/tinymce,leofeyer/tinymce,gencer/tinymce,tinymce/tinymce,adaptiffdesigns/tinymce