OP#19044 Fixed MathML component

src/app/app.module.ts

src/app/components/common/math/math.component.html

src/app/components/common/math/math.component.scss

src/app/components/common/math/math.component.spec.ts

src/app/components/common/math/math.component.ts

src/app/components/common/math/math.directive.ts

src/app/components/common/math/math.module.ts

src/app/components/common/math/math.service.ts

...onents/dcc/dcc-richcontent/dcc-richcontent.component.html

...mponents/dcc/dcc-richcontent/dcc-richcontent.component.ts

src/app/mathml/math/math.directive.ts

src/app/mathml/math/math.module.ts

src/app/mathml/math/math.service.ts

src/app/mathml/mathml.component.html

src/app/mathml/mathml.component.scss

src/app/mathml/mathml.component.spec.ts

src/app/mathml/mathml.component.ts

src/app/version/version.component.ts

src/assets/i18n/de.json

src/assets/i18n/en.json