Members of the military revolted in January, demanding wage increases and bonuses, but an economic crunch has stalled their demands.
Electoral officials said 93 percent of voters backed the changes.
The former First Lady is accused of helping organize post-election violence that killed some 3,000 people.
The Congolese musician died after collapsing on stage on Sunday.
Other African leaders have also condemned the attacks, which killed at least 30 people.
People from at least six countries died in the assault on Grand Bassam beach resort.
The former president is accused of crimes against humanity during violence after the 2010 election.
Wife of ex-president Laurent Gbagbo tried for role in 2011 post-election crisis in which 3,000 were killed.