* move queryRunner to panelModel
* Added interval back as prop, not used yet
* PanelQueryRunner: Refactoring, added getQueryRunner to PanelModel
* PanelQueryRunner: interpolatel min interval
* move queryRunner to panelModel
* remove isEditing from PanelChrome
* move listener to QueriesTab
* Fixed issue with isFirstLoad set to false before loading state is Done
* QueryRunner: Fixed issue with error and delayed loading state indication
* Anoter fix to issues with multiple setState calls in observable callbacks
Moves query execution logic to PanelQueryRunner and structures PanelChrome so it subscribes to the query results rather than necessarily controlling their execution.