Journalist UI change 6904

[rjbaarsma]

Status

Ready for review

Description of Changes

Fixes #6904.

Changes proposed in this pull request:

• The journalist Scripting has changed to disable buttons above the source rows as long as none of the rows are selected
• The journalist css has been changed to grey out disabled buttons,

Testing

I've not added unit tests for this change. Testing plan

• [ ] Build using make dev
• [ ] Log in as "journalist"
• [ ] The buttons above the source list (except for Select All and Select None) should be disabled, as no rows are selected
• [ ] Selecting any row will enable the buttons
• [ ] Buttons should always be enabled while any row is selected
• [ ] Using the Select All or Select None buttons should also affect the availability of the buttons

Checklist

• [x] These changes do not require documentation