CRM-14487 - Fixed PHP notices.

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* CRM-14487:
  https://issues.civicrm.org/jira/browse/CRM-14487
Clarify label and remove help on Create Participant form.
Merge pull request #3035 from davecivicrm/fixEventAmountLabel

Clarify label and remove help on Create Participant form.
fixed indentation and added comments, CRM-14503

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* CRM-14503: Incorrect global groups listing
  https://issues.civicrm.org/jira/browse/CRM-14503
Merge pull request #3036 from kurund/CRM-14503

fixed indentation and added comments, CRM-14503
Merge pull request #3026 from GinkgoFJG/CRM-14487

CRM-14487 - Fixed PHP notices.
Fix for CRM-14375: Membership fee doubled when fixed contribution option set to "no thank you."

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* CRM-14375: Membership fee doubled when fixed contribution option set to "no thank you"
  https://issues.civicrm.org/jira/browse/CRM-14375
Code clean-up. Initialized variables. Removed unused variables.
Clarify contribution form amount field help given the possibility of partial payments.
Merge pull request #3038 from davecivicrm/fixContribHelp

Clarify contribution form amount field help given the possibility of par...
Add required field to test case

This field was not required earlier but at some point I made it required as it was not possible to create a valid schedule without this or absolute_date
Resolve PHP notices.
Merge pull request #3037 from GinkgoFJG/CRM-14375

CRM-14375: Membership fee doubled when fixed contribution option set to "no thank you"
Merge pull request #3044 from colemanw/popup

Popup fixes
Hide button in popup mode