Several css fixes
Several css fixes

- colorful icons work in ie (sort of)
- range selection is using another color
- rich select got its overflow

killyosaur/ag-grid,killyosaur/ag-grid,seanlandsman/ag-grid,seanlandsman/ag-grid,ceolter/ag-grid,ceolter/ag-grid,ceolter/angular-grid,killyosaur/ag-grid,ceolter/angular-grid,seanlandsman/ag-grid