Remove extra spaces, use consistent casing for Alt, Shift, and Ctrl

src/settings/konsole.kcfg

@@ -42,24 +42,24 @@
   </group>
   <group name="ThumbnailsSettings">
       <entry name="ThumbnailSize" type="Int">
-        <label> Thumbnail Width </label>
-        <tooltip> Sets the width of the thumbnail </tooltip>
-        <default> 250 </default>
+        <label>Thumbnail Width</label>
+        <tooltip>Sets the width of the thumbnail</tooltip>
+        <default>250</default>
       </entry>
      <entry name="ThumbnailShift" type="bool">
-        <label> Use shift to display a thumbnail </label>
-        <tooltip> Use shift to display a thumbnail </tooltip>
-        <default> false </default>
+        <label>Use Shift to display a thumbnail</label>
+        <tooltip>Use Shift to display a thumbnail</tooltip>
+        <default>false</default>
       </entry>
      <entry name="ThumbnailAlt" type="bool">
-        <label> Use alt to display a thumbnail </label>
-        <tooltip> Use alt to display a thumbnail </tooltip>
-        <default> false </default>
+        <label>Use Alt to display a thumbnail</label>
+        <tooltip>Use Alt to display a thumbnail</tooltip>
+        <default>false</default>
       </entry>
      <entry name="ThumbnailCtrl" type="bool">
-        <label> Use ctrl to display a thumbnail </label>
-        <tooltip> Use ctrl to display a thumbnail </tooltip>
-        <default> false </default>
+        <label>Use Ctrl to display a thumbnail</label>
+        <tooltip>Use Ctrl to display a thumbnail</tooltip>
+        <default>false</default>
       </entry>
   </group>
   <group name="SearchSettings">