Enhance/codes selection

[cyfml]

This PR is based on last PR. It enables that codes can be selected and copied. And mouse icon is changed to grab-hand, when mouse is hover on file header.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[sebinside]

@cyfml This is also fine. Please clean the history so that we can also merge this PR.

[cyfml]

@sebinside I have cleaned the history, but PR has a problem. Can you take a look?

[tsaglam]

@sebinside I have cleaned the history, but PR has a problem. Can you take a look?

Did you merge the develop branch into your PR branch?

[cyfml]

@sebinside I have cleaned the history, but PR has a problem. Can you take a look?

Did you merge the develop branch into your PR branch?

Yes. Merged.

[cyfml]

You can check the last commit.

[sebinside]

@cyfml What do you mean with PR has a problem?

[cyfml]

@sebinside It seems build failed in Actions.

Error: Failed to execute goal org.sonarsource.scanner.maven:sonar-maven-plugin:3.9.1.2184:sonar (default-cli) on project aggregator: Parameter 'sonar.pullrequest.key' is mandatory for a pull request analysis -> [Help 1]
Error:
Error: To see the full stack trace of the errors, re-run Maven with the -e switch.
Error: Re-run Maven using the -X switch to enable full debug logging.
Error:
Error: For more information about the errors and possible solutions, please read the following articles:
Error: [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Error: Process completed with exit code 1.