Temp hand tool also uses the fill tool

[duianto]

Issue Type: Bug

When panning with the temp hand (space held) tool,
when the fill tool is selected,
and the fill tool has been used at least once.

Then the fill tool is used every time the left mouse button is released after panning.

Reproduction steps

1. Open an image with different colors,
   or draw two areas with different colors, that can be filled with the fill tool.
2. Change the foreground color to something that isn't most common on the image.
3. Select the fill tool.
4. Fill in one area on the image.
5. Hold down space.
6. Hold down the Left mouse button.
7. Move the mouse button to pan the image.
8. Release the Left mouse button.

Actual Behavior

The fill tool is used every time the left mouse button
is released while temp panning.

Expected

The main tool shouldn't be used when temp panning.

Notes

The History window adds new entries of the previous action,
when temp panning after having used the following tools at least once:
Move pixels
Draw rectangle

Extension version: 0.6.0
VS Code version: Code 1.57.0 (b4c1bd0a9b03c749ea011b06c6d2676c8091a70c, 2021-06-09T17:18:42.354Z)
OS version: Windows_NT x64 10.0.19043
Restricted Mode: Yes

System Info

Item	Value
CPUs	Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz (4 x 3093)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: unavailable_off opengl: enabled_on rasterization: unavailable_off skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	11.96GB (7.17GB free)
Process Argv	--crash-reporter-id 59a302e3-5caa-4bda-8390-b451e1103e43
Screen Reader	no
VM	0%

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