Remove pixel value from fonts

src/CommunitiesListItem.cpp

src/LoginPage.cpp

src/MainWindow.cpp

src/QuickSwitcher.cpp

src/RegisterPage.cpp

src/RoomInfoListItem.cpp

src/SuggestionsPopup.cpp

src/TopRoomBar.cpp

src/TypingDisplay.cpp

src/UserInfoWidget.cpp

src/UserSettingsPage.cpp

src/dialogs/CreateRoom.cpp

src/dialogs/MemberList.cpp

src/dialogs/ReadReceipts.cpp

src/dialogs/RoomSettings.cpp

src/dialogs/UserProfile.cpp

src/emoji/Category.cpp

src/emoji/ItemDelegate.cpp

src/timeline/TimelineItem.cpp

src/timeline/TimelineItem.h