[RFE] Please provide an option to remove all languages from the list

Description

Description of problem:
When you create a new project or version and configure languages, I need to delete one by one to just leave the necessary language(s).
It is often one or two only and it takes a long time to remove them, especially in zanata.org. It would be helpful if I am able to select all language and remove, then add necessary one(s) only.

Version-Release number of selected component (if applicable): 3.5

How reproducible: 100%

Steps to Reproduce:
1. Create a new project in Zanata
2. Click Settings and then select Languages tab.
3. Check the default list.
4. Try to set single language.

Actual results:
It requires to remove unnecessary languages from the list one by one.

Expected results:
It should allow to start from zero.

Additional info:

Status

Assignee

Unassigned

Reporter

ykatabam

Tested Version/s

None

Components

Priority

unspecified
Configure