Extraterm v0.26.0

• Added the new Extraterm logo. Thanks go to Gabriel Harel.
• Frames containing text and terminal output now spawn horizontal scrollbars if needed.
• Make the command palette appear after right mouse button in viewer tabs.
• Fix calculating the width of the terminal in the presence of fractional widths.
• Fix glitchy behaviour where text may shift up/down.
• Fix middle mouse button clipboard paste when done below the terminal area.
• Fix a bug where the current shell disappears after executing commands with the shell scrolled off screen.
• Fix a crash when exiting the app via the window close button.
• Prevent Electron from loading dragged and dropped files into the our windows.
• Copy mouse selections inside a viewer tab to the clipboard automatically.
• Make the "type selection" commands work when the cursor is not inside a frame but inside text.
• Strip out unneeded files from the packages/zips.