Point 1 

Remove tooltip on icons : 

Point 2 

I select "New" button.  Frame to create new thread is opened. 

I select "Cancel" button 

=>following frame is displayed :   

Point 3

When there are tags, on the left panel, there is a blank zone :

Point 4

There is a tooltip in english :

In file module, this button has no tooltip. 

Point 5 

Update this button name to "Modify" (remove a thread) : 

(Since we already are on a thread)

Point 6 

When title is too large, there is no text to indicate it to user : 

Example on tasks :