INST: fixed: installer.py did not let the user answer yes\no in case conda not installed
INST: fixed: installer.py did not let the user answer yes\no in case conda not installed

Former-commit-id: 9bdcf560662f5109eba6307d8242a090b6f6c2e1 [formerly 19f0f298060f802b0b628bfbefa9d7a884e6e428]
Former-commit-id: 365d3c80b50742631d85e4ac1de8edd6aa355d73
Former-commit-id: ff2e7a55dd5057f8c20acaf42fedac075f282bfd
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox