Description:
As soon as any key is pressed in the file name box of the Save or Save As dialogs it just repeats over and over and won't stop.

Steps to Reproduce:
1.Open any document
2.Click Save As or Save for a new document
3.Pres a key in the Name field

Actual Results:  
The key repeats over and over preventing the name from being entered at all

Expected Results:
A single character should be produced.


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
What happened to severity levels of high and critical. This is a show stopper as it prevents any filenames being entered at all.

Version: 6.0.0.3
Build ID: 64a0f66915f38c6217de274f0aa8e15618924765
CPU threads: 8; OS: Linux 4.15; UI render: default; VCL: kde4; 
Locale: en-GB (en_GB.UTF-8); Calc: group

OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: Quadro 2000M/PCIe/SSE2
OpenGL core profile version string: 4.5.0 NVIDIA 390.25
OpenGL core profile shading language version string: 4.50 NVIDIA
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 4.6.0 NVIDIA 390.25
OpenGL shading language version string: 4.60 NVIDIA
OpenGL context flags: (none)
OpenGL profile mask: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.2 NVIDIA 390.25
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:



User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0