Dashboard -> Table special signs in column name leads to parsing error

[mucke2701]

Expected Behavior

If a User creates a Dashboard and adds a table-widget where are special signs in the column names (like "$%&:()"). A User should A: Be notified that some signs can't be used in column names B: show the table, respectively

Actual Behavior

If a User creates a Dashboard and adds a table-widget where are special signs in the column names (like "$%&:()"). A parsing error is shown in the Widget field which leads to a ugly Dashboard.

Steps to Reproduce the Problem

1. get a dataset with a column names with special signs and upload to geonode
2. create a dashboard
3. create a table-widget based on the dataset

Specifications

• GeoNode version:
• Installation type (geonode-project): geonode-project
• Installation method docker): docker
• Platform: Ubuntu
• Additional details: