Install Helm chart form doesn't allow the user select a specific version

When the user installs a helm chart, the dropdown to select a specific version is always disabled. Also for helm charts that can upgraded or downgraded after installation. For example the nodejs helm chart.

At least 4.11, maybe all versions, but a backport to 4.11 is fine

Always

1. Switch to developer perspective
2. Navigate to Add > Helm chart
3. Select the Nodejs helm chart
4. Try to select another version
..
When the user installs the not selectable version and edit the helm chart there is another version to selec 

The version is not selectable.

The version should be selectable.