Properly set default theme, closes #1065.
Merge pull request #1581 from cmfcmf/default-theme

This PR was merged into zikula:1.3 branch.

Discussion
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Properly set default theme, closes #1065.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | ---
| Fixed tickets | #1065
| Refs tickets  | ---
| License       | MIT
| Doc PR        | ---

Commits
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44f9e233aa277fc52baf922452660504234ed0a4 Properly set default theme, closes #1065. cmfcmf