Some improvements of Copy/Move dialog

[Slavic]

In its simple form, Copy or Move dialog is self-descriptive and its usage shouldn't be a problem. However, in the advanced mode [ Options >> ] its functioning may be less obvious for non-experienced users.

1) This dialog doesn't have a [ Help ] button, even though F1 works. It opens the section "File operations" where user has to click "F5 Copy" or "F6 Rename/Move", only then the corresponding Help article will be shown. People who prefer to use mouse, may don't suppose that the help even exists. There is enough free space in the Advanced options area to place the Help button, or at least [ ? ] which would show the help article directly.

2) The Advanced area has two small square buttons, their purpose may be not enough clear: blue pin and diskette. First button makes the advanced view permanently visible, second one saves the chosen overwrite option to configuration. Unfortunately, both buttons don't have tooltips and aren't shown in the help article (diskette is mentioned as a Save button, without image). It would be better to add tooltips and maybe also their images to the help. For example, in the dialog "Synchronize directories" all graphical buttons have the tooltips.