UI fixes of data table on page 'Projects'

[jennyxu6]

There are several UI issues on this page, which make it difficult to understand the content of the data table. For example, it's unclear what actions can be taken on the table. Also, different elements are mixed in the same column, '# issues'.

Following fixes are proposed:

• [x] Search field should be closer to the form: proximity principle
• [x] Click on a row to open the project
• [x] Unclear meaning of checkboxes Fix disabled import button Import button should be on the individual project page.
• [x] Separate import button from issue numbers
• [x] Ambiguous meaning of ‘category’
• [x] Too short description
• [x] Add pagination to the form
• [x] Column already sortable, but the wrong indicator when hovered over

[jennyxu6]

UPDATE: Ambiguous meaning of ‘category’: 'category' is an attribute of a project from JIRA. Projects in Jira like Spark, Hadoop, etc. maintain project categories.