Update translations and help

about/help_en

@@ -11,8 +11,8 @@ img { margin: 5px; }
 
 <p>Tenmon is intended primarily for viewing astro photos and images. It supports the following formats:
 <ul>
-    <li>FITS 8, 16 bit integer and 32 bit float</li>
-    <li>XISF 8, 16 bit integer and 32 bit float</li>
+    <li>FITS 8, 16, 32 bit integer and 32, 64 bit float</li>
+    <li>XISF 8, 16, 32 bit integer and 32, 64 bit float</li>
     <li>JPEG, PNG, BMP, GIF, PBM, PGM, PPM and SVG images</li>
     <li>CR2, NEF, DNG raw images</li>
 </ul>
@@ -54,12 +54,14 @@ To open an image, you can also drag and drop it to main window.</p>
     <li>mid point - defines the value to be stretched to 50% intensity</li>
     <li>white point - all pixels with higher value (brighter) than this will be clipped white</li>
 </ul>
-Following the slider are 5 buttons for automatic stretching:
+Following the slider are 7 buttons for automatic stretching:
 <ul>
+    <li><i>Linked channels</i> toggle stretching each RGB channel individually.</li>
     <li><i>Auto Stretch</i> automatically apply black and mid points to render the image with optimal brightness.</li>
     <li><i>Reset</i> reset three values for black, mid and white point to default.</li>
     <li><i>Invert</i> invert colors to display the image as negative.</li>
-    <li><i>Super pixel CFA </i> average 2x2 pixels into one (suitable for images from colour camera).</li>
+    <li><i>False colors</i> show black and white in false colour palette.</li>
+    <li><i>Debayer CFA</i> Demosaicing black and white image from CFA sensor to color one.</li>
     <li><i>Apply Auto stretch on load</i> toggle automatically applying Autostretch for each image when loaded.</p>
 </ul>