Improve compile times a tiny bit

src/CommunitiesListItem.h

src/InviteeItem.cpp

src/InviteeItem.h

src/LoginPage.cpp

src/LoginPage.h

src/RegisterPage.cpp

src/RegisterPage.h

src/RoomList.cpp

src/SideBarActions.cpp

src/TopRoomBar.h

src/UserInfoWidget.cpp

src/UserInfoWidget.h

src/UserSettingsPage.h

src/dialogs/InviteUsers.cpp

src/dialogs/InviteUsers.h

src/dialogs/ReadReceipts.cpp

src/dialogs/ReadReceipts.h

src/dialogs/RoomSettings.cpp

src/dialogs/RoomSettings.h

src/emoji/Category.cpp