When Active Line indicator is selected, then the Selected Text attributes should be modified to distinguish the selection

[fyodorovich]

The text attributes of the active line indicator and of selected text are the same.

The selected text is always on the active line (with the exception of multi-caret selections), so it is impossible to determine which text is selected when the active line indicator option is used.

When the user chooses to have the active line indicator displayed, the selected text should automatically be modified to ensure that selected text is visibly highlighted.

[manateelazycat]

PR are welecome.