[Imagine plugin] spelling corrected of Javascript methods

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | -
| Fixed tickets | -
| Refs tickets  | -
| License       | MIT
| Doc PR        | -

method names were spelled as Perset instead of Preset
[Imagine plugin] Incorrect z-hide update in configuration.js

This part should not have been changed in the PR https://github.com/zikula/core/pull/1645
[imagine plug] This part also should not have changed in configuration.js
Merge pull request #1645 from espaan/patch-1

This PR was merged into zikula:1.4 branch.

Discussion
----------

[Imagine plugin] spelling corrected of Javascript methods

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | -
| Fixed tickets | -
| Refs tickets  | -
| License       | MIT
| Doc PR        | -

method names were spelled as Perset instead of Preset

Commits
-------

5239c40a0b5a14e493a3ce5b4f5c09566a273e7b [Imagine plugin] spelling corrected of Javascript methods

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | -
| Fixed tickets | -
| Refs tickets  | -
| License       | MIT
| Doc PR        | -

method names were spelled as Perset instead of Preset espaan
c168d82e0e4a3d41999b9516971b74111b0579bb [Imagine plugin] Incorrect z-hide update in configuration.js

This part should not have been changed in the PR https://github.com/zikula/core/pull/1645 espaan
a7b2974b564d97a2b1127a362cf2e4b3e4193d42 [imagine plug] This part also should not have changed in configuration.js espaan