Update screen edges KCM docs

doc/kwinscreenedges/index.docbook

@@ -14,8 +14,8 @@
 <!-- TRANS:ROLES_OF_TRANSLATORS -->
 </authorgroup>
 
-<date>2015-07-14</date>
-<releaseinfo>Plasma 5.3</releaseinfo>
+<date>2021-04-09</date>
+<releaseinfo>Plasma 5.20</releaseinfo>
 
 <keywordset>
 <keyword>KDE</keyword>
@@ -32,25 +32,24 @@ will get activated on each edge and corner of the screen.
 
 <para>Click with any mouse button onto a square and select an effect 
 in the context menu. Edges with a blue square have already an attached effect, 
-a grey colored square indicates that no effect is selected for this edge.</para>
+a grey-colored square indicates that no effect is selected for this edge.</para>
 
 <para>The number of accessible items in the context menu depends on the settings in the module
 	<ulink url="help:/kcontrol/kwineffects/index.html">
 <guilabel>Desktop Effects</guilabel></ulink> in the <guilabel>Workspace</guilabel>
-category. Select your favorite effects on the from the <guilabel>Window Management</guilabel> 
+category. Select your favorite effects from the <guilabel>Window Management</guilabel> 
 group. This activates the corresponding items in the context menu.</para>
 
 <para>If you are looking for the setting to enable switching of desktops by 
 pushing your mouse cursor against the edge of the screen choose one of the <guilabel>Present 
 Windows</guilabel> effects from the context menu.</para>
 
-<para>In the <guilabel>Window Management</guilabel> section you can enable to 
-<guilabel>Maximize windows by dragging them to the top of the screen</guilabel>
-or to <guilabel>Tile windows by dragging them to the side of the window</guilabel>
+<para>You can enable <guilabel>Maximize: Windows dragged to top edge</guilabel>
+or <guilabel>Tile: Windows dragged to left or right edge</guilabel>
 and set a percentage of the screen to trigger the tiling.
 </para>
 
-<para>In the <guilabel>Other Settings</guilabel> section configure if you want to switch 
+<para>Using the <guilabel>Switch desktop on edge</guilabel> item, configure if you want to switch 
 to another desktop when pushing the mouse cursor to an edge of the screen, &eg; only when 
 moving windows.
 </para>