Give focus to the panes that users can interact with using the keyboard

Problem Description

The shortcut switch to explorer (Ctrl+Shift+X) does not move the keyboard cursor to the correct window pane. This was working in Spyder 3.7

What steps reproduce the problem?

1. Install spyder=4.0.0
2. Try using Ctrl+Shift+X
3. Cursor is still in last current pane

What is the expected output? What do you see instead?

The expected output is that after I hit the shortcut, I can use the keyboard to navigate the Explorer pane, however the cursor remains on the last-used pane.

Versions

• Spyder version: 4.0.0
• Python version: Python 3.6.9 64-bit
• Qt version: Qt 5.9.6
• PyQt version: PyQt5 5.9.2
• Operating System name/version: Windows 2008ServerR2

Dependencies

cloudpickle >=0.5.0          :  1.2.2 (OK)
pygments >=2.0               :  2.5.2 (OK)
qtconsole >=4.6.0            :  4.6.0 (OK)
nbconvert >=4.0              :  5.6.1 (OK)
sphinx >=0.6.6               :  2.2.2 (OK)
pylint >=0.25                :  2.4.4 (OK)
psutil >=0.3                 :  5.6.7 (OK)
qtawesome >=0.5.7            :  0.6.0 (OK)
qtpy >=1.5.0                 :  1.9.0 (OK)
pickleshare >=0.4            :  0.7.5 (OK)
zmq >=17                     :  18.1.0 (OK)
chardet >=2.0.0              :  3.0.4 (OK)
numpydoc >=0.6.0             :  0.9.1 (OK)
spyder_kernels >=1.8.1;<2.0.0:  1.8.1 (OK)
qdarkstyle >=2.7             :  2.7 (OK)
atomicwrites >=1.2.0         :  1.3.0 (OK)
diff_match_patch >=20181111  :  20181111 (OK)
intervaltree                 :  None (OK)
watchdog                     :  None (OK)
keyring                      :  None (OK)
pexpect >=4.4.0              :  4.7.0 (OK)
pympler                      :  None (OK)
sympy >=0.7.3                :  None (NOK)
cython >=0.21                :  None (NOK)
IPython >=4.0                :  7.10.1 (OK)
matplotlib >=2.0.0           :  3.1.1 (OK)
pandas >=0.13.1              :  0.25.3 (OK)
numpy >=1.7                  :  1.17.4 (OK)
scipy >=0.17.0               :  1.3.1 (OK)
pyls >=0.31.2;<0.32.0        :  0.31.2 (OK)
rtree >=0.8.3                :  0.8.3 (OK)

[jnsebgosselin]

Did I just dream it?

No, you didn’t. I also remember it too, but I don’t recall its number.

It was on Gitter. This behavior is already somewhat implemented for the plot pane, see PR #11684

[ccordoba12]

I agree. Leaving this for 4.2.0 because it could require important changes to several panes (most probably not, but I want to be on the safe side here).