Release 3.18.1
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* After some GTK+ changes during the last few releases, there were some
  regressions in LaTeXila. Because of the overlay scrollbars, it was not
  possible to select some characters with the mouse. And when (1) line numbers
  are not displayed and (2) the side panel is visible, it is not possible to
  move the cursor before the first character of a line (with the mouse),
  because at that region of the screen the mouse permits to change the size of
  the side panel…
  So to avoid those regressions:
	* Overlay scrolling is disabled at some places
	* Line numbers are now displayed by default

* Added Portuguese translation
* Added Ukrainian help translation