Some suggestions #360

Just some more suggestions for the new SB4 version:

• ignore _ in fuzzy search of commands;
• highlight some yet not highlighted keywords (e.g. break and continue) and classes names;
• change double click selection logic, for example select only the inner part of a string (inside quotes) and whole float numbers;
• probably introduce Projects notion to SB (like workspaces in VS Code) to better organise scripts and decrease the number of simultaneously opened tabs.