Visualization issues

[Bianca-LM]

1. In the descriptions of a single attribute, if an apostrophe (') is inserted when creating the record every character after it won't be shown in the information box;
2. In the multimedia attribute, when a value is inserted it appears under the box in a white square which aspect instinctively recalls a pop-up widget for suggestions or recently deleted elements. In order to make it clearer that the value has been correctly inserted it would be better to find another visualization, e.g. a transparent background still under the box of insertion.
3. In the "Explore" page, the titles can only start with letters, there is no managing of punctuation which, if present, provides the following error:
   
   This passage is managed by the following lines in "../static/js/main.js":