Change UI string for "Tablet Mode" to "Touch Mode"

"Tablet Mode" is jargon that can confuse users. In this mode, things
become larger as an optimization for touch usage, but the word "tablet"
could easily refer to a drawing tablet, for which no touch
optimizations make sense.

Let's change the UI text here to call it "Touch Mode" instead.

applets/systemtray/package/contents/ui/ConfigGeneral.qml

@@ -36,7 +36,7 @@ ColumnLayout {
         }
         QQC2.Label {
             visible: Kirigami.Settings.tabletMode
-            text: i18n("Automatically enabled when in tablet mode")
+            text: i18n("Automatically enabled when in Touch Mode")
             font: Kirigami.Theme.smallFont
         }
 
@@ -79,7 +79,7 @@ ColumnLayout {
         }
         QQC2.Label {
             visible: Kirigami.Settings.tabletMode
-            text: i18nc("@info:usagetip under a combobox when tablet mode is on", "Automatically set to Large when in tablet mode")
+            text: i18nc("@info:usagetip under a combobox when Touch Mode is on", "Automatically set to Large when in Touch Mode")
             font: Kirigami.Theme.smallFont
         }
     }