Hide some of kwin kcm on mobile

Summary:
- Window decorations, useless, since we use maximized and borderless
  windows
- Virtual Desktop, odd concept to be useful on mobile
- KWin Effects, doesn't have much of usecase on mobile

Reviewers: nicolasfella, davidedmundson

Reviewed By: davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D22336

kcmkwin/kwindecoration/kwindecoration.desktop

@@ -11,6 +11,8 @@ X-KDE-System-Settings-Parent-Category=applicationstyle
 X-KDE-Weight=40
 X-DocPath=kcontrol/kwindecoration/index.html
 
+X-KDE-FormFactors=desktop,tablet
+
 Name=Window Decorations
 Name[ar]=زخارف النوافذ
 Name[bg]=Декорации на прозорците

kcmkwin/kwindecoration/package/metadata.desktop

@@ -13,6 +13,7 @@ X-KDE-PluginInfo-Website=https://www.kde.org/plasma-desktop
 X-KDE-ServiceTypes=Plasma/Generic
 X-Plasma-API=declarativeappletscript
 X-Plasma-MainScript=ui/main.qml
+X-KDE-FormFactors=desktop,tablet
 
 Name=Window Decorations
 Name[ar]=زخارف النوافذ

kcmkwin/kwindesktop/package/metadata.desktop

@@ -112,5 +112,6 @@ X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-Name=kcm_kwin_virtualdesktops
 X-KDE-ServiceTypes=Plasma/Generic
 X-Plasma-API=declarativeappletscript
+X-KDE-FormFactors=desktop
 
 X-Plasma-MainScript=ui/main.qml

kcmkwin/kwineffects/kcm_kwin_effects.desktop

@@ -12,6 +12,8 @@ X-KDE-ParentApp=kcontrol
 X-KDE-System-Settings-Parent-Category=desktopbehavior
 X-KDE-Weight=50
 
+X-KDE-FormFactors=desktop,tablet
+
 Name=Desktop Effects
 Name[bs]=Efekti površi
 Name[ca]=Efectes d'escriptori

kcmkwin/kwineffects/package/metadata.desktop

@@ -98,5 +98,6 @@ X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-Name=kcm_kwin_effects
 X-KDE-ServiceTypes=Plasma/Generic
 X-Plasma-API=declarativeappletscript
+X-KDE-FormFactors=desktop,tablet
 
 X-Plasma-MainScript=ui/main.qml