Bug fixes

• Fix the symbols tree hierarchy when several tags have the same name

Interface

• Add a tooltip showing the full path on menu items representing documents
• Add a note for applying the indent settings in the project preferences
• Enable popup menu on sidebar and message window notebooks
• Show status message on attempt to execute empty context action
• GTK3 theming improvements and documentation

Filetypes

• CSS: Update Grid properties

Internationalization

• Updated translations: de, el, es, fr, it, lv, pl, pt, tr, ru, zh_CN

Signed-off-by: Pierre-Yves <pyu@riseup.net>

Build a basic test code

#include <iostream>
#include <string>
int main()
{
  std::string s("This is a test");
  std::cout<<s<<std::endl;
  return 0;
}