Description:
I have LibreOffice 6.0.4.2 on Linux Mint. I just upgraded to Linux Mint 19 some days ago. Then, LibreOffice 6.0.5 is available, so the usual pop-up bubble appears on the top-right corner, except that now there is no icon in the menu bar. The appropriate area gets highlighted in white, but no icon is visible. This is unlikely to be intended as there is no way for the user to notice the new update unless they hover the mouse over that area. The bug appears in all components of the suite.

Steps to Reproduce:
1. Open the specified version when there's a new version available.
2. Click on 'Help' -> 'Check for updates' if the pop-up does not appear.
3. Close the dialog.
4. Hover the mouse over the rightmost side of the menu bar, just on the left of the 'x'.

Actual Results:
Although there is no icon on the bar, the area gets highlighted, and the pop-up bubble appears.

Expected Results:
It should have displayed an icon notifying the user that an update is indeed available, then highlight the icon when they hover the mouse over it.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Screenshot (kind of...):

    #################################################
    ########################################,---.####
    ########################################|   |#x##
    -------------------------------------------------
     _________________________________________|\_ 
    |  ,-.                                       |>>
    |  \ /   LibreOffice update available        |
    |   =                                        |
    |        Click the icon for more information |
    |____________________________________________|

Notice the empty box (highlighted area on white with borders).


Version: 6.0.4.2
Build ID: 9b0d9b32d5dcda91d2f1a96dc04c645c450872bf
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk2; 
Locale: en-US (en_US.UTF-8); Calc: group


System:    Host: User-PC Kernel: 4.15.0-24-generic x86_64 bits: 64 gcc: 7.3.0
           Desktop: Cinnamon 3.8.8 (Gtk 2.24.32) dm: lightdm Distro: Linux Mint 19 Tara
Machine:   Device: desktop System: ASUS product: All Series serial: N/A
           Mobo: ASUSTeK model: AM1M-A v: Rev X.0x serial: N/A
           BIOS: American Megatrends v: 1302 date: 10/27/2015
CPU:       Quad core AMD Athlon 5350 APU with Radeon R3 (-MCP-) arch: Jaguar rev.1 cache: 2048 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm) bmips: 16801
           clock speeds: min/max: 800/2000 MHz 1: 1131 MHz 2: 855 MHz 3: 1376 MHz 4: 983 MHz
Graphics:  Card: NVIDIA GK208 [GeForce GT 730] bus-ID: 01:00.0 chip-ID: 10de:1287
           Display Server: x11 (X.Org 1.19.6 )
           drivers: nvidia (unloaded: modesetting,fbdev,vesa,nouveau)
           Resolution: 1366x768@59.79hz
           OpenGL: renderer: GeForce GT 730/PCIe/SSE2 version: 4.6.0 NVIDIA 390.48 Direct Render: Yes