#109 Enhancement for explorer home page

[aswallace]

• Create 3 min-width CSS classes for dialog box, add prop to dialog box to trigger these
• Make the dialog box title background use$primary -- also changed font to $primary-white so it would be visible, and removed the $secondary-mid variable I added in Add styling to dialog box #104
• Link explorer header tabs (currently visualization and create route to blank pages)
• Rewrite chart routes in explorer -- didn't add components to ones that haven't been made yet
• Added a Base.vue for charts so that they can have their own router-view for child routes

Close #109

[tholulomo]

👍