functionality:
    (done) sasplanet zipped sqlitedbs parser
refactor:
    (done) extract file opener from settings activity
    (done) extract zip parser from settings activity
    (done) make use of Config.kt
fix:
    app rotation with placed point
ui:
    (done) proper file loading menu
    (done) translation usage
test:
    khm:
        read header
        get height
        get multiple heights
    merc:
        offset from coords
        coords from offset
    parsers:
        read values into inner db