pass alt-numbers to the shell (fixes Eugeny#217)

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link plugin pages in the plugin list

ci fix

context menu (fixes Eugeny#42)

appveyor fix

bumped ng-bootstrap

invert scroll-zoom (fixes Eugeny#184)

allow null values in config (fixes Eugeny#165)

ignore unavaiable persistence providers in SessionsService (fixes Eug…

…eny#159)