* Remove unused options in graph template and add information for export options

* Remove unused split option in graph template
* Change help for width and height in graph template
* Add information for chart options only for export

Ref: #4884

* Set lower, upper limit on chart

Set on chart the lower and upper based on chart template.

Ref: #4884

* Change legends in charts

* Legend is external
* Add extra information (MAX, MIN, LAST...)
* Add action for hide/show all curve

Ref: 4884

* Add split view with new chart system

* Add a page for view a service chart splited by metrics

Ref: #4990

* Add chart display page with differents periods

* Add page for display differents periods of a chart
* Add load interval display by html attribute in charts
* Add action on graph page for go to periods page or split page

* Better style for large legends

* Explain usage of area color for curve template

* Improve help text for area color
* Fix english language

Ref: #5033

* Coding style

* Add button for split and periods view in performance

Ref: #4884