Change labels in the load data UI

[giorgiouboldi]

In which part of the interface would this feature applies?

[x ] 1. Load your data
[ ] 2. Choose a chart
[ ] 3. Mapping
[ ] 4. Customize
[ ] 5. Export

Is your feature request related to a problem? Please describe.
It's a suggestion to improve the experience of the loading data process

Describe the solution you'd like
I would re-sort the data input and change the labels in the following way:

• Paste your data
• From file
• From URL
• From SPARQL query
• Try our samples
• Open your project