Filtering translation units in the editor according to the content state (Translated, Fuzzy, Untranslated) and hide mode navigation button when filtering is active. 


The proposed workflow is to allow 3 checkboxes labeled - Translated, Needs Review and Untranslated and based upon the user's selection the appropriate set of strings would be displayed in the editor.

Considerations:

1. Search filtering must be sensibly combined with state filtering
2. Confirmation dialog when editor is open and filter is changed, eg "current cell does not match selected filter", do you want to save it? Save Changes/Discard Changes/Cancel Filter Change
3. (Bonus points: Try to preserve the position (selected TU) if possible.)