Fix for issue #379 - making null-safe source_project_id

Closes #379

See merge request Commit451/LabCoat!41

Drop the redundant private_token GET parameter

See merge request Commit451/LabCoat!40

Quoting from the GitLab API: "You can use a personal access token to authenticate with the API by passing it in either the private_token parameter or the Private-Token header.".

By using it as GET parameter we expose our tokens to sniffing!

Resolve "Increase label display limit"

Closes #300

See merge request Commit451/LabCoat!38

Update strings.xml (fix #348)

Closes #348

See merge request Commit451/LabCoat!37

Automatically set issue label title color based on background color

Closes #281

See merge request Commit451/LabCoat!35

Removed editText onActionListener

See merge request Commit451/LabCoat!36

Save currentPath state

Closes #159

See merge request Commit451/LabCoat!34