Werk #6469: New Theme: Fixed again several bugs

This werk includes Fixes for: - Hover with "loading..." message of Graph Preview - Text shadow of PEND in services of hosts view - Size of Perf-O-Meter in views where no headers are configured - Missing line break in EC SNMP MIBs - Size of column of acknowledge in analyze configuration if no icon is shown - default template in reports is now in new colors, too - Snapins in dashboards are now in new theme, too - Date filter in Release notes

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