nm widget is missing some icons and text

[Uqbar]

The network manager widget should show some text and possibly icons close to two check-boxes: one is for wifi and one (i presume) for airplane mode.
As of now, none is displayed leaving only two unlabeled and de-iconized check-boxes.
Please see attached screen-shot.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: plasma-desktop 4:5.5.5-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-lowlatency 4.4.6
Uname: Linux 4.4.0-21-lowlatency x86_64
NonfreeKernelModules: pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv xt_multiport iptable_filter ip_tables x_tables 8812au cfg80211 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi hp_wmi sparse_keymap intel_rapl snd_hda_intel x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec kvm_intel kvm snd_hda_core irqbypass crct10dif_pclmul snd_hwdep crc32_pclmul usblp input_leds snd_pcm aesni_intel snd_seq_midi aes_x86_64 lrw gf128mul glue_helper snd_seq_midi_event ablk_helper cryptd snd_rawmidi serio_raw snd_seq snd_seq_device snd_timer snd mei_me soundcore mei lpc_ich shpchp mac_hid 8250_fintek parport_pc ppdev lp parport autofs4 xfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 multipath linear uas usb_storage hid_generic usbhid hid raid0 amdkfd amd_iommu_v2 radeon i915 ttm i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci psmouse drm r8169 libahci mii wmi fjes video
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Apr 25 11:09:27 2016
InstallationDate: Installed on 2016-04-22 (2 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: plasma-desktop
UpgradeStatus: No upgrade log present (probably fresh install)