Provide 'copy to clipboard' for build log in UI
In LAVA web UI when copying from full test log and pasting in the browser all line breaks are lost. It would be nice to have ability to copy the test log and paste it with line breaks. Similar feature is available for job definition as 'copy to clipboard' button. Either this or 'plain text view' of the job log would be very useful. The plain text log should not contain any LAVA timestamps or log levels. Full log is OK.
Migrated from https://projects.linaro.org/browse/LAVA-1057