Updated Credits store's backend libraries due to security policy changes.
Alliance invitation menu now makes sure the airline is not listed as a possible invitee if it shares HQ/base with any other existing alliance member. (n.b. this does not apply to alliance application from the applying airlines' side since this still within the old UI)
Fixes
Low Credits balance e-mails were being sent out too often.
Notifications of in-game messages did not always pop to the main navigation's notification balloon.
Scheduling page's search data became sometimes corrupted preventing the page load.
Alliance icon of an alliance still in founding state ( = not yet offically formed) showed up in route planning's airline schedule listing.
If an aircraft was in long-term storage and a model conversion (e.g. to freighter) was performed, and the plane was taken out of the long-term storage while the conversion maintenance was still ongoing, the D check included in the conversion was not being performed. Fixed by disabling the long-term storage removal while conversion maintenance is ongoing.
