Some apps names or keywords contain multiple words. For example 'LibreOffice
Calc' contains the word 'Calc'. This is rightfully detected as a prefix match,
however generally it is expected that searching for 'calc' would consistantly
return 'Calculator' in first position, instead of ranking them equally.
We now prioritise tokens that would otherwise rank equal based on where they
occur in the string, giving earlier occurences precedence.
