Fixed some issue

[vincenzopalazzo]

Hi @atarw,

I Fixing some bug

• Attending test atarw#75
• Attending test atarw#74
• Attending Test atarw#73
• Attending test atarw#72

I'm creating a pull request because I believe that the issue are solved and then to allow those who have the problem to test the changes.

The changes are

Button arrow jspinner

button arrow Jcombobox

Mouse hover on JMenu Mouse hover on JSpinner and jComboBox

Reinsert old icon in JXTaskPane