Custom fonts appear blurry on high dpi monitors

Version: 1.0.2
Operating System: macOS 10.15.7
## My Issue

Custom loaded fonts appear somewhat blurry. This seems to be a regression from previous dearpygui versions 0.6 when loading fonts. I don't have a non high DPI monitor to check but @Pcothren mentioned he had seen this issue on high DPI but not regular monitors.

## Screenshots


I know it looks like a small issue, but the whole interface ends up looking slightly blurry. Even for larger fonts the edges are soft. Perhaps for the high dpi scaling non-integer scaling is happening? Oddly the horizontal direction seems to be more blurred than the vertical dimension.

## Standalone, minimal, complete and verifiable example

```python
import dearpygui.dearpygui as dpg
import dearpygui

dpg.create_context()

with dpg.font_registry():
# Download font here: https://fonts.google.com/specimen/Open+Sans
font = dpg.add_font("OpenSans-Regular.ttf", 15, tag="ttf-font"
)

with dpg.window(label="Fonts") as main_window:
dpg.add_text(default_value=f"DPG {dearpygui.__version__}: default font.")
dpg.add_text(default_value=f"DPG {dearpygui.__version__}: custom ttf font.")
dpg.bind_item_font(dpg.last_item(), "ttf-font")

dpg.create_viewport()
dpg.setup_dearpygui()
dpg.set_primary_window(main_window, True) # Should fill viewport but does not on macOS
dpg.show_viewport()
dpg.start_dearpygui()
dpg.destroy_context()
```