[Keyboard][Pinyin] Switch back to default page instead of symbol panel
Bug 1039957 - [master] Make only check box hide when FDN enabled. r=Arthur.
Bug 1041411 - (Part I) Move some methods from fakeAppObject to InputMethodGlue
Bug 1041411 - (Part II) Remove global variables of comp instances
Merge pull request #21731 from weideng/bug1038516

 [Keyboard][Pinyin] Switch back to default page instead of symbol panel. r=rlu
Bug 1041411 - (Part III) Create KeyboardApp and replace fakeAppObject
Bug 1041411 - (Part IV) Move IMEngineSettings handling to InputMethodManager
Merge pull request #22007 from timdream/keyboard-app

Bug 1041411 - Create KeyboardApp and replace fakeAppObject, r=rudyl
Merge pull request #22006 from weigao123/bug1039957-master

Bug 1039957 - [master] Make only check box hide when FDN enabled. r=Arthur.