Pod and Pipeline log should be selectable (via tab) and content should be select-all-able (ctrl+a)

Description of problem:

Our users wants to select the Pod or Pipeline log output without the mouse. It should be possible to use the "select all" command via the keyboard shortcut ctrl+a or cmd+a after selecting the log (via click or pressing tab).

Prerequisites (if any, like setup, operators/versions):

1. Pipelines Operator for the Pipeline log

Steps to Reproduce

1. Import a Deployment which builds and enable Add Pipeline
2. Open the Pod log which runs the build
3. Open the Pipeline Run log tab
4. Try to select the log output via ctrl+a / cmd+a

Actual results:

1. The log output is not selectable via tab
2. When pressing ctrl+a / cmd+a the content of the complete page is selected

Expected results:

1. The log output is selectable via tab
2. When pressing ctrl+a / cmd+a only the content of the log is selected

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

Tested 4.8 (master, commit e63847533cc78d1ee883c334d215dda21d23745b)

Additional info:

None