File Manager: Escaping HTML and other issues

[iliajie]

There were found some issues:

1. Not displaying whitespaces properly in file names
2. Not opening directories correctly when quotes are used
3. Not sanitizing tricky file names, like str_<p onmouseover="alert(1)">.txt(1)(1)

[iliajie]

Few more things to fix.

1. Directory having % not working correctly;
2. New tab for tricky directory name lacks of proper escaping;
3. Navigation breadcrumb quick access acts fancy on directories having single or double quotes, i.e. shows content of the current directory instead of a parent;
4. Directory loader is not showing when clicking on it;
5. Manual path input should be decoding the string.