Changes for introducing Tabs in Datacleaner scheduling page
Removed alerts and also rectified the width of tabular panel
Merge pull request #109 from datacleaner/TabFunctionality

This code will facilitate scehduler screen to showcase the jobs in a better way, i.e properly grouped. To use this functionality JOB should have the metadata properties set as follows

<metadata-properties>
             <property name="Group">waser</property>
            <property name="Category">ONBOARDING</property>

        </metadata-properties>

Based on the above metadata-properties Schedule page will create the TABs in scheduler page to show case jobs of same "Category" property and in each tab will group the jobs based on "Group" property.

All the corner cases are covered as well. e.g If user doesn't provide any such metadata properties in that case the functionality will fall back to the current implementation