Only apply styles on admin nav, not every nav.
Merge pull request #1606 from cmfcmf/style-fix

This PR was merged into zikula:1.3 branch.

Discussion
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Only apply styles on admin nav, not every nav.

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

Commits
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b3a71f69399904c373600470ccfa9cd7042d1be6 Only apply styles on admin nav, not every nav. cmfcmf