Desktop: Fixes #2476: Fix window dimensions and position when the application starts (#2514)

* ElectronClient window minimum size set

Hardcoded minimum width and height of 100 px.

Signed-off-by: daukadolt <daulet.amirkhanov.official@gmail.com>

* Set Electron window position if outside displays

Set Electron window at the center of primaryDisplay if BrowserWindow is not on any displays.

Signed-off-by: daukadolt <daulet.amirkhanov.official@gmail.com>

* Set Electron window default size dependent on screen

Set Electron window defaultWidth, defaultHeight to 80% of primary display workArea width, height, respectively.

Signed-off-by: daukadolt <daulet.amirkhanov.official@gmail.com>

* Hotfixing Electron defaultHeight depending on width, not height

Hotfix of a typo that calculates Electron app's default height at first run using primary screen's width, not height.

Signed-off-by: daukadolt <daulet.amirkhanov.official@gmail.com>

* Refactoring Electron app defaultWidth/defaultHeight setup

Setting defaultWidth/defaultHeight directly without extra variables.
Rounding defaultWidth/defaultHeight.

Signed-off-by: daukadolt <daulet.amirkhanov.official@gmail.com>