Mexico is developing a new cellphone app for its citizens who are in the United States illegally so they can notify their family members and the nearest Mexican consulate if they are facing deportation, according to a Mexican official on Friday. The move comes in response to potential mass deportations of illegal immigrants in the United States under the incoming Trump administration. Juan Ramón de la Fuente, Mexico’s secretary of foreign affairs, said the app is currently in small-scale testing, and it “appears to be working very well.” De la Fuente described it as a “panic button” in a statement to The Associated Press….