Translation-related changelog

New strings!

Addons support:
menu.nsx:

[menu_btn]
addons="ADD-ONS"
addons_activate="Activate"

[menu_cap]
addons="ADD-ONS"

[menu_cfg]
mod_empty="Empty slot"

[menu_msg_newaddons]
caption="NEW ADD-ONS" textFontSize* '1.33 1.33'
text='New Blood Omnicide expansion packs was just found. Please visit More/Add-ons page to check installed expansions.'