highlighting is broken for situations where there is punctuation surrounded by whitespace

[roedoejet]

see

where the last word has a semicolon surrounded by white-space, this was probably removed and whitespace collapsed, resulting in a mismatch in indices. I should add some tests for this type of edge case

[Maamashkaach]

There were some other issues that broke highlighting as well. Here is my fix:

file: mothertongues-UI/packages/mtd-mobile-ui/src/app/shared/search-entry-list.component.ts

[dhdaines]

Thank you!