Normally, you can navigate the category list in the incidence editor just by pressing the keys corresponding to the initial letters of your categories. For example, if you want to tag an event or task as "family", you open the category list, press "f" and it will take you through all the categories starting with an "f". Ideally, you just push the corresponding key a few times, then push space, and you category is assigned. 

This is extremely convenient! However, it doesn't work with subcategories. I think it must be because the initial letters of subcategories must be recognized as the "tab" key, because subcategories are viewed as indented. 

Reproducible: Always

Steps to Reproduce:
1. Open an event or task and open the categories selection list. 
2. Pick a random category and press the key that corresponds to the initial letter, for example "f" for "family" or "p" for "personal". Do the same with a subcategory. 
3. The category can be conveniently selected by pressing the initial letter key, but the subcategory cannot. 
Actual Results:  
It should be possible to jump to any category, no matter if it is subordinated or not, by just clicking the initial letter key. 

Expected Results:  
It would be great if the subcategories would be treated the same.