Some letter icons realigned.

Also, the instructional MD file and the comment within the SFD file have been updated to make the steps a little clearer.

Catch is, something broke and I can't fully run `make-iconfont.sh` so until I can fix that someone else will have to do that step.

papers/icons.md

@@ -2,7 +2,7 @@ To generate a new letter icon:
 
 - Open `res/icons.sfd` in FontForge.
 - Open "IBM Plex Sans Medium" to the side. Return to the icons font.
-- Copy the two baselines from `E0F0` to the new codepoint.
+- Copy the (blank-looking) glyph at `E0F0` to the new codepoint. It contains two baselines.
 - Open the new codepoint.
 - Select the upper baseline.
 - Use `Element | Insert Text Outlines...` to place text:
@@ -10,16 +10,20 @@ To generate a new letter icon:
   - Align "centered".
   - Type first line of text into the box.
   - Click the "Insert" button (might need window resize to be visible).
-- Delete the baseline.
-- If there's a line 2, repeat for the lower baseline, including deletion.
+- Delete the upper baseline.
+- If there's a second line of letters, repeat for the lower baseline.
+- Delete the lower baseline.
 - Select all.
-- Use `Element | Transformations | Transform...` to Scale Uniformly (from glyph origin) and Move as needed:
+- Use `Element | Transformations | Transform...` to scale and place the text:
+  - For "Origin", select "Glyph Origin".
+  - In the drop-down beneath that, select "Scale Uniformly", and beneath that, "Move". Fill in values as below:
     - One letter: 12000%, X 896, Y 15.5.
     - Two letters: 10000%, X 896, Y 99.2.
     - Three letters: 8000%, X 896, Y 183.
     - Two lines: 8000%, X 896, Y 618.5.
   - If resulting glyph is too wide, repeat all steps starting with "IBM Plex Sans Condensed Medium" instead.
-  - Remember to close the other IBM Plex font or select the proper one in the text dialog.
+    - Remember to close the other IBM Plex font or select the proper one in the "Insert Text Outlines..." dialog.
+  - Hit `OK`. The letter icon should be properly sized and centered.
 - Save.
 - Use `File | Generate Fonts...` to export `res/icons.ttf`.
   - "Validate before saving" should be turned off.